5 - BIO 311C Fall 2010 You are responsible for all reading...

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BIO 311C Fall 2010 You are responsible for all reading assignments, even when the reading material goes beyond the lecture information. Lecture 5 – Friday 3 Sept. 2010 1 *
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Ribosomes are attached to the cytoplasmic surface of the endoplasmic reticulum and to the cytoplasmic surface of the outer membrane of the nuclear envelope. They are used to synthesize: -w a t e r
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The rough endoplasmic reticulum (r.e.r. ) and nuclear envelope facilitate compartmentalization of different kinds of proteins in eukaryotic cells. Portion of a eukaryotic cell Slice through a piece of the endoplasmic reticulum transmembrane protein water soluble protein proteins that were synthesized by ribosomes attached to endoplasmic reticulum or the outer membrane of the nuclear envelope. water soluble protein (protein that was synthesized by a non- attached ribosome) Cytoplasmic matrix 3
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Functions of the Rough Endoplasmic Reticulum Insertion of proteins into the fabric of the e.r. membrane or into the lumen for: -construct ing new membrane , -chem ica l process ing (mod if icat ion of prev
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s.e.r. tubule s.e.r. ±bleb², in the process of pinching off to form a bubble- like vesicle The s.e.r. in some cells occurs only as blebs that are slight extensions of
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5 - BIO 311C Fall 2010 You are responsible for all reading...

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