Home work_answers - Home work answers 1. Two extreme models...

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Home work answers 1. Two extreme models - vesicular transport and cisternal maturation have been proposed to account for the movement of molecules across the polarized structure of the Golgi (from cis to trans). In the vesicular transport model, the individual Golgi cisternae remain in place as proteins move through them. On the contrary, the individual cisternae move across the stack, carrying the proteins with them in the cisternal maturation model. Transport vesicles serve critical functions in both models, but their roles are distinctly different. Describe the roles of the transport vesicles 1) in the forward movement of proteins across the Golgi stack and 2) in the retention of Golgi resident proteins. (Answer with less than 100 words.) In the vesicular transport model, vesicles carry proteins across the stack by budding from one cisterna and fusing with the next. It is this role in the forward movement of proteins that is the critical difference between the two models. Vesicles are required 1) for forward movement of secretory proteins, 2) for
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This note was uploaded on 11/21/2011 for the course PCB 3134 taught by Professor Multiple during the Fall '08 term at University of Florida.

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Home work_answers - Home work answers 1. Two extreme models...

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