BIOL 200 Study Guide - Final Guide: Tubulin, Histone H1, Phosphatase
Document Summary
Mechanical strain within cells and in tissues. Made up of long, twisted strands of fibrous proteins. Twisting of coiled coils via hydrophobic amino acids. One bundle of filament = 8 tetramers (octamer) = 32 monomer strands. Note: plants (and all invertebrates) don"t have ifs. Kinesin takes us to the positive end towards the periphery. Golgi is near the nucleus. closer to centrosome/nucleus. Actin monomers (g-actin) assemble into actin filaments (f-actin). All myosin motor proteins (except myosin-v) moves towards the . Attached : adp-bound myosin head is attached to actin filament. Released and shifts : adp switched for atp, affinity for actin reduced, myosin head. Powerstroke : atp hydrolysis. myosin head binds to new site on actin, pi is released, can slide along filament. head binds tightly and moves back to original conformation, dragging actin with it. Responsible for cytoplasmic streaming and amoeboid motion: parallel bundles.
