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Enzyme Collection

Background imageEnzyme Collection: DNA transcription, molecular model

DNA transcription, molecular model

Background imageEnzyme Collection: Metabolic enzyme, artwork

Metabolic enzyme, artwork
Metabolic enzyme. Computer artwork of aconitase (blue), in complex with ferritin messenger ribonucleic acid (mRNA, red)

Background imageEnzyme Collection: HIV reverse transcription enzyme

HIV reverse transcription enzyme. Molecular models of the reverse transcriptase enzyme found in HIV (the human immunodeficiency virus)

Background imageEnzyme Collection: Hepatitis C virus enzyme, molecular model

Hepatitis C virus enzyme, molecular model
Hepatitis C virus enzyme. Molecular model of a genetic enzyme from the Hepatitis C virus. This enzyme is called HC-J4 RNA polymerase

Background imageEnzyme Collection: Glutamine synthetase enzyme

Glutamine synthetase enzyme computer model. This is a ligase enzyme, which forms chemical bonds between molecules. The different colours show the different subunits that comprise the protein

Background imageEnzyme Collection: Anatomy of Organs Engraving

Anatomy of Organs Engraving
Engraved illustrations of Anatomy of the Fasciae, Integuents, and Organs of Mastication and Respiration from Iconographic Encyclopedia of Science, Literature and Art, Published in 1851

Background imageEnzyme Collection: RNA-editing enzyme, molecular model

RNA-editing enzyme, molecular model
RNA-editing enzyme

Background imageEnzyme Collection: Manganese superoxide dismutase enzyme F006 / 9423

Manganese superoxide dismutase enzyme F006 / 9423
Manganese superoxide dismutase enzyme, molecular model. This enzyme scavenges and decomposes the potentially toxic first reduction product, superoxide, of aerobic respiration

Background imageEnzyme Collection: Cytochrome b5 molecule C015 / 6696

Cytochrome b5 molecule C015 / 6696
Cytochrome b5. Molecular model of cytochrome b5 from a cows liver

Background imageEnzyme Collection: Calcium ATPase ion pump, molecular model

Calcium ATPase ion pump, molecular model. This enzyme is found in muscle cell membranes, where it pumps calcium in and out of muscle cells and controls muscle contractions

Background imageEnzyme Collection: Detailed diagram of kidney stone

Detailed diagram of kidney stone, Labeled anatomy of human kidney stone, Kidney stones, a hard, crystalline mineral material formed within the kidney renal calculi

Background imageEnzyme Collection: Anatomy of the structure and layers of the stomach wall

Anatomy of the structure and layers of the stomach wall

Background imageEnzyme Collection: Isocitrate dehydrogenase kinase F006 / 9698

Isocitrate dehydrogenase kinase F006 / 9698
Isocitrate dehydrogenase kinase. Molecular model of isocitrate dehydrogenase kinase phosphatase (AceK) complexed with its substrate isocitrate dehydrogenase (ICDH)

Background imageEnzyme Collection: Thrombin protein, molecular model F006 / 9603

Thrombin protein, molecular model F006 / 9603
Thrombin protein, molecular model. Thrombin is an enzyme involved in the blood coagulation (clotting) process

Background imageEnzyme Collection: Succinyl-CoA synthetase enzyme F006 / 9592

Succinyl-CoA synthetase enzyme F006 / 9592
Succinyl-CoA synthetase bound to GTP, molecular model. Also known as succinyl coenzyme A synthetase (SCS), this enzyme catalyses the reversible reaction between succinyl-CoA and succinic acid

Background imageEnzyme Collection: Citrate acid cycle enzyme F006 / 9305

Citrate acid cycle enzyme F006 / 9305
Citrate acid cycle enzyme. Molecular model of the enzyme dihydrolipoamide succinyltransferase

Background imageEnzyme Collection: Pyruvate dehydrogenase complex C018 / 9192

Pyruvate dehydrogenase complex C018 / 9192
Pyruvate dehydrogenase complex, 3D model

Background imageEnzyme Collection: Eosinophil white blood cell, TEM

Eosinophil white blood cell, TEM
Eosinophil white blood cell. Transmission electron micrograph (TEM) of a section through an eosinophil white blood cell (leukocyte)

Background imageEnzyme Collection: Pancreatic acinar cell

Pancreatic acinar cell

Background imageEnzyme Collection: Thrombin complexed with fibrinogen C015 / 7149

Thrombin complexed with fibrinogen C015 / 7149
Thrombin complexed with fibrinogen, molecular model. The thrombin molecules (left and right, brown and pink) are bound to the central part of the fibrinogen molecule (centre, multiple colours)

Background imageEnzyme Collection: Coagulation factor complex molecule C014 / 0139

Coagulation factor complex molecule C014 / 0139
Coagulation factor complex molecule. Molecular model showing the interaction between coagulation factor VIII (FVIII, pink, blue and yellow) and factor IXa (FIXa, cream and grey)

Background imageEnzyme Collection: Illustration showing how enzymes flow through human pancreatic duct into duodenum of small intestine

Illustration showing how enzymes flow through human pancreatic duct into duodenum of small intestine, breaking down peptides into amino acids

Background imageEnzyme Collection: Conceptual image of enterokinase

Conceptual image of enterokinase. Also known as enteropeptidase, it is an enzyme produced by cells of the duodenum and involved in human and animal digestion

Background imageEnzyme Collection: A blastocyst begins implanting in the wall of the uterus

A blastocyst begins implanting in the wall of the uterus

Background imageEnzyme Collection: Microscopic view of H5N1 virus with red blood cells and white blood cells

Microscopic view of H5N1 virus with red blood cells and white blood cells

Background imageEnzyme Collection: 3D structure of pyruvate dehydrogenase complex

3D structure of pyruvate dehydrogenase complex
3D structure of the 11 megadalton pyruvate dehydrogenase complex which is responsible for synthesis of the key metabolite acetyl CoA

Background imageEnzyme Collection: Structure of HIV

Structure of HIV

Background imageEnzyme Collection: A black swarm of H5N1 avian flu viruses are attacked by antibodies

A black swarm of H5N1 avian flu viruses are attacked by antibodies (the three legged elements), which mark the virus for destruction

Background imageEnzyme Collection: Conceptual image of lysosome

Conceptual image of lysosome. Lysosomes are cellular organelles that contain acid hydrolase enzymes that break down waste materials and cellular debris

Background imageEnzyme Collection: Charles Herbert Best (1899-1978) Canadian physiologist: assisted Banting in isolating

Charles Herbert Best (1899-1978) Canadian physiologist: assisted Banting in isolating the hormone Insulin. Discovered the vitamin choline and the enzyme histaminase

Background imageEnzyme Collection: Illustration of pancreas

Illustration of pancreas
Medicine: Human anatomy, pancreas. Drawing

Background imageEnzyme Collection: DNA transcription, illustration C018 / 0900

DNA transcription, illustration C018 / 0900
DNA (deoxyribonucleic acid) transcription

Background imageEnzyme Collection: Ricin A-chain, artwork C017 / 3653

Ricin A-chain, artwork C017 / 3653
Ricin A-chain. Computer artwork showing the enzymatically active A-chain from a molecule of the toxic protein ricin. Ricin comprises two entwined amino acid chains; A (seen here) and B (not shown)

Background imageEnzyme Collection: Antibiotic resistance enzyme molecule C017 / 2272

Antibiotic resistance enzyme molecule C017 / 2272
Antibiotic resistance enzyme. Molecular model of the New Delhi metallo-beta-lactamase 1 enzyme. This bacterial enzyme confers antibiotic resistance on cells that carry it

Background imageEnzyme Collection: Ricin molecule, artwork C017 / 3652

Ricin molecule, artwork C017 / 3652
Ricin molecule. Computer artwork showing the structure of a molecule of the toxic protein ricin. Ricin comprises two entwined amino acid chains; A (yellow) and B (blue)

Background imageEnzyme Collection: Antibiotic resistance enzyme molecule C017 / 2271

Antibiotic resistance enzyme molecule C017 / 2271
Antibiotic resistance enzyme. Molecular model of the New Delhi metallo-beta-lactamase 1 enzyme. This bacterial enzyme confers antibiotic resistance on cells that carry it

Background imageEnzyme Collection: Ricin molecule, artwork C017 / 3651

Ricin molecule, artwork C017 / 3651
Ricin molecule. Computer artwork showing the structure of a molecule of the toxic protein ricin. Ricin comprises two entwined amino acid chains; A (yellow) and B (blue)

Background imageEnzyme Collection: Ricin molecule, artwork C017 / 3650

Ricin molecule, artwork C017 / 3650
Ricin molecule. Computer artwork showing the structure of a molecule of the toxic protein ricin. Ricin comprises two entwined amino acid chains; A (yellow) and B (blue)

Background imageEnzyme Collection: Restriction enzyme and DNA, artwork F007 / 6436

Restriction enzyme and DNA, artwork F007 / 6436
Restriction enzyme. Compute artwork of a restriction enzyme (orange) complexed with DNA (deoxyribonucleic acid, blue)

Background imageEnzyme Collection: DNA polymerase molecule F007 / 6422

DNA polymerase molecule F007 / 6422
DNA polymerase molecule. DNA polymerases are enzymes that synthesise new strands of DNA from a complementary template strand

Background imageEnzyme Collection: Flap endonuclease protein F007 / 9914

Flap endonuclease protein F007 / 9914
Molecular model of the flap endonuclease protein

Background imageEnzyme Collection: Flap endonuclease protein F007 / 9916

Flap endonuclease protein F007 / 9916
Molecular model of the flap endonuclease protein

Background imageEnzyme Collection: Yeast enzyme, molecular model F007 / 9913

Yeast enzyme, molecular model F007 / 9913
Yeast enzyme. Molecular model of an enzyme from bakers yeast (Saccharomyces cerevisiae). This is the 20S proteasome. A proteasome is a complex type of proteinase (protein-digesting enzyme)

Background imageEnzyme Collection: Type I topoisomerase protein bound to DNA F007 / 9893

Type I topoisomerase protein bound to DNA F007 / 9893
Type I topoisomerase bound to DNA. Molecular model showing a type I topoisomerase molecule (blue) bound to a strand of DNA (deoxyribonucleic acid, yellow and red)

Background imageEnzyme Collection: Ubiquitin activating enzyme protein E1 F007 / 9919

Ubiquitin activating enzyme protein E1 F007 / 9919
Molecular model of a ubiquitin-activating enzyme, also known as E1 enzymes. These catalyse the first step in the ubiquitination reaction, which targets a protein for degradation via a proteasome

Background imageEnzyme Collection: Yeast enzyme, molecular model F007 / 9887

Yeast enzyme, molecular model F007 / 9887
Yeast enzyme. Molecular model of an enzyme from bakers yeast (Saccharomyces cerevisiae). This is the 20S proteasome. A proteasome is a complex type of proteinase (protein-digesting enzyme)

Background imageEnzyme Collection: SEM of biological washing powder H130 / 0217

SEM of biological washing powder H130 / 0217
Washing powder. Coloured Scanning Electron micrograph (SEM) of granules of biological washing powder. Some of the granules are partially opened

Background imageEnzyme Collection: HIV-1 protease molecule

HIV-1 protease molecule
HIV-1 protease, molecular model. This enzyme, from HIV (human immunodeficiency virus), cleaves viral polyproteins into functional proteins that are essential for viral assembly and infectivity

Background imageEnzyme Collection: Tyrosyl-tRNA synthetase molecule

Tyrosyl-tRNA synthetase molecule
Tyrosyl-tRNA synthetase protein molecule. Molecular model showing bacterial tyrosyl-tRNA synthetase complexed with tyrosyl tRNA (transfer ribonucleic acid)

Background imageEnzyme Collection: Endonuclease IV molecule

Endonuclease IV molecule. Molecular model of the endonuclease IV restriction enzyme EcoRV (grey) bound to a cleaved section of DNA (deoxyribonucleic acid, blue, orange and pink)

Background imageEnzyme Collection: ATP synthase molecule C014 / 0880

ATP synthase molecule C014 / 0880
ATP synthase molecule. Molecular model showing the structure of ATP synthase (ATPase) subunit C

Background imageEnzyme Collection: HIV enzyme protein, molecular model C014 / 0876

HIV enzyme protein, molecular model C014 / 0876
HIV enzyme protein. Computer model showing the structure of the catalytic domain of a molecule of HIV-1 retroviral integrase (IN) from the human immunodeficiency virus (HIV)

Background imageEnzyme Collection: Tryptophanyl-tRNA synthetase molecule

Tryptophanyl-tRNA synthetase molecule
Tryptophanyl-tRNA synthetase protein molecule. Molecular model showing human tryptophanyl-tRNA synthetase complexed with tryptophan tRNA (transfer ribonucleic acid)

Background imageEnzyme Collection: EcoRV restriction enzyme molecule C014 / 2117

EcoRV restriction enzyme molecule C014 / 2117
EcoRV restriction enzyme. Molecular model of the type II restriction enzyme EcoRV (purple and blue) bound to a DNA molecule (deoxyribonucleic acid, pink and white)

Background imageEnzyme Collection: HIV enzyme protein, molecular model

HIV enzyme protein, molecular model
HIV enzyme protein. Computer model showing the structure of the catalytic domain of a molecule of HIV-1 retroviral integrase (IN) from the human immunodeficiency virus (HIV)

Background imageEnzyme Collection: EcoRV restriction enzyme molecule C014 / 2112

EcoRV restriction enzyme molecule C014 / 2112
EcoRV restriction enzyme. Molecular model of the type II restriction enzyme EcoRV (pink) bound to a cleaved section of DNA (deoxyribonucleic acid, yellow)

Background imageEnzyme Collection: DNA repair, artwork

DNA repair, artwork
DNA repair. Computer artwork of a DNA (deoxyribonucleic acid) ligase enzyme (yellow) repairing damaged DNA (spiral) in a chromosome (upper left)

Background imageEnzyme Collection: Ricin A-chain, artwork C017 / 3654

Ricin A-chain, artwork C017 / 3654
Ricin A-chain. Computer artwork showing the enzymatically active A-chain from a molecule of the toxic protein ricin. Ricin comprises two entwined amino acid chains; A (seen here) and B (not shown)

Background imageEnzyme Collection: EcoRV restriction enzyme molecule C014 / 2114

EcoRV restriction enzyme molecule C014 / 2114
EcoRV restriction enzyme. Molecular model of the type II restriction enzyme EcoRV (white and gold) bound to a cleaved section of DNA (deoxyribonucleic acid, orange and yellow)

Background imageEnzyme Collection: EcoRV restriction enzyme molecule C014 / 2116

EcoRV restriction enzyme molecule C014 / 2116
EcoRV restriction enzyme. Molecular model of the type II restriction enzyme EcoRV (purple and blue) bound to a DNA molecule (deoxyribonucleic acid, pink and white)

Background imageEnzyme Collection: Ricin molecule, artwork C017 / 3649

Ricin molecule, artwork C017 / 3649
Ricin molecule. Computer artwork showing the structure of a molecule of the toxic protein ricin. Ricin comprises two entwined amino acid chains; A (yellow) and B (blue)

Background imageEnzyme Collection: Nepenthes: tropical pitcher plant

Nepenthes: tropical pitcher plant
The insectivorous nepenthes plants are epiphitic plants that grow on the branches of trees common in Australia, the Phillipines and Malaysia

Background imageEnzyme Collection: EcoRV restriction enzyme molecule C014 / 2115

EcoRV restriction enzyme molecule C014 / 2115
EcoRV restriction enzyme. Molecular model of the type II restriction enzyme EcoRV (purple and blue) bound to a DNA molecule (deoxyribonucleic acid, pink and white)

Background imageEnzyme Collection: Rubisco enzyme molecule F006 / 9776

Rubisco enzyme molecule F006 / 9776
Rubisco. Molecular model of the enzyme rubisco (ribulose bisphosphate carboxylase oxygenase) complexed with 2-carboxyarabinitol biphosphate

Background imageEnzyme Collection: Rubisco enzyme molecule F006 / 9779

Rubisco enzyme molecule F006 / 9779
Rubisco. Molecular model of the enzyme rubisco (ribulose bisphosphate carboxylase oxygenase) complexed with ribulose-1, 5-biphosphate

Background imageEnzyme Collection: NADP-dependent isocitrate dehydrogenase F006 / 9778

NADP-dependent isocitrate dehydrogenase F006 / 9778
NADP-dependent isocitrate dehydrogenase, molecular model. This enzyme catalyses the third step in the citric acid (or Krebs) cycle, the process by which mitochondria convert glucose to energy

Background imageEnzyme Collection: Catalase, molecular model F006 / 9774

Catalase, molecular model F006 / 9774
Catalase. Molecular model of catalase from a cow liver. This enzyme to water and oxygen. Hydrogen peroxide is a highly toxic byproduct of a number of normal cellular processes

Background imageEnzyme Collection: Glycogen phosphorylase molecule F006 / 9775

Glycogen phosphorylase molecule F006 / 9775
Glycogen phosphorylase. Molecular model of glycogen phosphorylase bound to AMP (adenosine monophosphate)

Background imageEnzyme Collection: Triose phosphate isomerase molecule F006 / 9777

Triose phosphate isomerase molecule F006 / 9777
Triose phosphate isomerase (TPI), molecular model. TPI is essential for glycolysis and catalyses the reversible interconversion of dihydroxyacetone phosphate and glyceraldehyde-3-phosphate

Background imageEnzyme Collection: Metabolic enzyme molecule F006 / 9770

Metabolic enzyme molecule F006 / 9770
Metabolic enzyme. Molecular model of the enzyme aconitase with isocitrate bound. Aconitase is involved in the citric acid (or Krebs) cycle

Background imageEnzyme Collection: Dihydrofolate reductase molecule F006 / 9772

Dihydrofolate reductase molecule F006 / 9772
Dihydrofolate reductase, molecular model. This enzyme converts the vitamin folic acid into a coenzyme

Background imageEnzyme Collection: HIV-1 protease and inhibitor F006 / 9773

HIV-1 protease and inhibitor F006 / 9773
HIV-1 protease and inhibitor. Molecular model of the enzyme HIV-1 protease (pink and blue ribbons) bound to an inhibitor molecule (centre)

Background imageEnzyme Collection: Ribonuclease A molecule F006 / 9768

Ribonuclease A molecule F006 / 9768
Ribonuclease A (RNAse A), molecular model

Background imageEnzyme Collection: Pepsin stomach enzyme F006 / 9767

Pepsin stomach enzyme F006 / 9767
Pepsin stomach enzyme, molecular model. Pepsin is a protease enzyme that is secreted as part of gastric juice into the stomach in an inactive form known as pepsinogen

Background imageEnzyme Collection: Xylose isomerase complex F006 / 9765

Xylose isomerase complex F006 / 9765
Xylose isomerase complex. Molecular model of the enzyme D-xylose isomerase bound to the sugar alcohol sorbitol. D-xylose isomerase is involved in fructose and mannose metabolism

Background imageEnzyme Collection: Phosphofructokinase bacterial enzyme F006 / 9762

Phosphofructokinase bacterial enzyme F006 / 9762
Phosphofructokinase enzyme, molecular model. This enzyme, from the bacterium Bacillus stearothermophilus, is involved in regulating the process of releasing energy from glucose

Background imageEnzyme Collection: Methionine aminopeptidase molecule F006 / 9756

Methionine aminopeptidase molecule F006 / 9756
Methionine aminopeptidase, molecular model. This enzyme removes the amino acid methionine from proteins

Background imageEnzyme Collection: Flu virus surface protein and drug F006 / 9745

Flu virus surface protein and drug F006 / 9745
Flu virus surface protein and drug. Molecular model of the neuraminidase glycoprotein enzyme from on the surface of the influenza A (flu) virus bound to the drug zanamivir

Background imageEnzyme Collection: Human lysine-specific demethylase F006 / 9747

Human lysine-specific demethylase F006 / 9747
Human lysine-specific demethylase, molecular model. This enzyme removes methyl groups from lysine residues in histones (proteins that package DNA)

Background imageEnzyme Collection: Beta-lactamase molecule F006 / 9746

Beta-lactamase molecule F006 / 9746
Beta-lactamase enzyme, molecular model. This bacterial protein provides resistance to beta-lactam antibiotics, which include penicillin

Background imageEnzyme Collection: Human muscle aldolase, molecular model F006 / 9742

Human muscle aldolase, molecular model F006 / 9742
Human muscle aldolase. Molecular model of the enzyme human muscle aldolase complexed with its substrate fructose 1, 6-bisphosphate

Background imageEnzyme Collection: GMP synthetase enzyme F006 / 9734

GMP synthetase enzyme F006 / 9734
GMP synthetase enzyme, molecular model. This enzyme, guanine monophosphate synthetase, catalyses the reaction that converts xanthosine monophosphate to guanosine monophosphate

Background imageEnzyme Collection: Parathion hydrolase enzyme F006 / 9731

Parathion hydrolase enzyme F006 / 9731
Parathion hydrolase, molecular model. This enzyme hydrolyses bonds in organophosphates, which include pesticides and the nerve gas sarin

Background imageEnzyme Collection: Iron-regulatory protein bound to RNA F006 / 9727

Iron-regulatory protein bound to RNA F006 / 9727
Iron-regulatory protein bound to RNA, molecular model. Iron regulatory protein 1 (IRP1, purple) bound to a short strand of RNA (ribonucleic acid, red) that includes iron-responsive elements (IREs)



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EDITORS COMMENTS

Enzymes: The Molecular Architects of Life DNA transcription, molecular model: they are the key players in the intricate process of DNA transcription, where they faithfully transcribe genetic information into RNA molecules. Metabolic enzyme, artwork: Metabolic enzymes act as catalysts in various biochemical reactions within our bodies, ensuring efficient metabolism and energy production. HIV reverse transcription enzyme: This remarkable enzyme allows the human immunodeficiency virus (HIV) to convert its RNA genome into DNA, enabling it to integrate with our own genetic material. Hepatitis C virus enzyme, molecular model: Understanding the structure and function of hepatitis C virus enzymes is crucial for developing effective treatments against this persistent viral infection. Anatomy of Organs Engraving: Enzymes play a vital role in maintaining organ health by facilitating essential processes like digestion, respiration, and hormone regulation throughout our body's intricate anatomy. Manganese superoxide dismutase enzyme F006 / 9423: This antioxidant enzyme protects cells from harmful free radicals by converting them into less damaging substances—a guardian against oxidative stress. Cytochrome b5 molecule C015 / 6696: As an electron carrier protein found in cell membranes, cytochrome b5 assists other enzymes in performing critical metabolic reactions involved in energy production and lipid metabolism. Glutamine synthetase enzyme: Essential for nitrogen metabolism, glutamine synthetase ensures that ammonia produced during cellular processes is safely converted into non-toxic compounds like amino acids or urea. RNA-editing enzyme, molecular model: These specialized enzymes modify RNA molecules after their synthesis—fine-tuning gene expression patterns and expanding the diversity of proteins encoded by our genes. ATPase molecule: ATPases are indispensable for cellular energy transfer; these enzymes hydrolyze adenosine triphosphate (ATP), releasing stored energy to power various cellular processes.

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