Enzyme Collection

DNA transcription, molecular model. Secondary structure of the enzyme RNA polymerase II synthesising a mRNA (messenger ribonucleic acid, lilac) strand from a DNA (deoxyribonucleic acid)

Metabolic enzyme, artwork
Metabolic enzyme. Computer artwork of aconitase (blue), in complex with ferritin messenger ribonucleic acid (mRNA, red). Aconitase is involved in the citric acid cycle but here it is performing a

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

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

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

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

RNA-editing enzyme, molecular model
RNA-editing enzyme. Molecular model of a left-handed, RNA double helix (Z-RNA, centre) bound by the Z alpha domain of the human RNA-editing enzyme ADAR1 (double-stranded RNA adenosine deaminase)

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

Cytochrome b5 molecule C015 / 6696
Cytochrome b5. Molecular model of cytochrome b5 from a cows liver. Cytochrome molecules perform oxidation and reduction reactions for electron transport

Anatomy of the structure and layers of the stomach wall

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

Citrate acid cycle enzyme F006 / 9305
Citrate acid cycle enzyme. Molecular model of the enzyme dihydrolipoamide succinyltransferase. This enzyme is involved in the citric acid (or Krebs) cycle

Pyruvate dehydrogenase complex C018 / 9192
Pyruvate dehydrogenase complex, 3D model. This enzyme complex is responsible for the step that links glycolysis to the citric acid (Krebs) cycle

Pancreatic acinar cell. Transmission electron micrograph (TEM) of a section through an enzyme-secreting acinar cell in the human pancreas, showing part of the nucleus (round, far left)

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)

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

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

A blastocyst begins implanting in the wall of the uterus

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

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

Structure of HIV

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

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

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

Illustration of pancreas
Medicine: Human anatomy, pancreas. Drawing

DNA transcription, illustration C018 / 0900
DNA (deoxyribonucleic acid) transcription. Illustration of an RNA (ribonucelic acid) polymerase molecule (centre) synthesising an mRNA (messenger RNA) strand (bottom)

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)

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

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)

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

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)

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)

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

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

Flap endonuclease protein F007 / 9914
Molecular model of the flap endonuclease protein. This is a class of nucleolytic enzymes that act as both 5 -3 exonucleases

Flap endonuclease protein F007 / 9916
Molecular model of the flap endonuclease protein. This is a class of nucleolytic enzymes that act as both exonucleases and structure-specific endonucleases on specialised DNA structures that occur

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)

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)

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

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)

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

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

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

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)

ATP synthase molecule C014 / 0880
ATP synthase molecule. Molecular model showing the structure of ATP synthase (ATPase) subunit C. ATPase is an important enzyme that provides energy for cells through the synthesis of adenosine

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)

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

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)

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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.