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Coloured TEM of endoplasmic reticulum andamp;amp; nucleus

Rough endoplasmic reticulum and nucleus. Coloured transmission electron micrograph of thenucleus (green) and rough endoplasmic reticulum(ER), coloured red, in a mammalian cell. ER is acomplex membrane system, originating from thenuclear membrane, that divides the cell cytoplasminto a network of cavities called cisternae. Thesurface of rough ER is covered with bodies calledribosomes, (black dots on the membrane). Ribosomeson ER (as opposed to free-floating ribosomes)produce proteins that are secreted outside thecell. Mitochondria are turquoise. Magnification:x3850 at 6x6cm size. Magnification: x4, 500 at 4x5inch size. Magnification: x3, 900 at 6x7cm size.. Stunning Photo Gifts From Science Photo Library