BIO 102 Unit 4 Part 1_ Cytoskeleton Notes

In cytoskeleton rich r egions size limit was even

Info iconThis preview shows page 1. Sign up to view the full content.

View Full Document Right Arrow Icon
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: free solution. In cytoskeleton-rich r egions, size limit was even smaller. significance: cytoskeleton mediates transport of vesicles from ER to Golgi Major Fibr ous Polymers of the Cytoplasm: * microtubules (24 nm diameter): composed of polymerized alpha-beta tubulin dimer s and associated binding proteins * intermediate filaments (10 nm diameter ) polymerized IF subunits and associated binding pr oteins * actin/micr ofilaments (7 nm diameter) polymer ized globular (G)-actin and associated binding proteins * actin filaments and Mts are polarized polymer s; Ifs ar e apolar * actin/MT polarity is a cr itical pr operty w ith respect to functions for these polymer s both with r espect to assembly/disassembly driven processes and molecular motor dependent pr ocesses Intermediate filaments cour se out fr om surface Microtubules extend out fr om a perinuclear MT or ganizing center : the centr osome Epithelial cells: actin filaments Mixed polarity "contractile" r ing of fi...
View Full Document

{[ snackBarMessage ]}

Ask a homework question - tutors are online