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Unformatted text preview: ific proteins binding receptors Fig. 2-6 Fig. 2-7 CV coated w/
and recycled. forms vesicle w/
ﬂuid INSIDE. transmembrane
proteins act as
Receptors can move laterally, they cluster together to form CV. ^^ all these directed by
cytoskeleton in cell! Receptor-mediated endocytosis
allows maximal control of the
process. Peripheral membrane
proteins, including clathrin, cause
formation of coated pits, budding
inward as coated vesicles (CV).
These then fuse as endosomes,
which may later fuse with various
cytoplasmic organelles as
directed by their surface proteins. Clathrin binds to inside of cell membrane -- forms COATED PIT, which become coated vesicles. Ribosomes, polyribosomes, and rough endoplasmic reticulum (RER)
many bound to surface of MEMBRANEOUS NETWORK. Called Endoplasmic Reticulum. RER in green here e- dense areas = black =
ribosomes Fig. 2-10 some ribosomes
FREE in cytoplasm Polysomes are ribosomes on mRNA and have two general locations in the cell.
They may be free in the cytoplasm (left), making cytoplasmic proteins (or
proteins to be imported into the nucle...
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- Spring '14