BIOL107 Lecture Notes - Lecture 14: Intermediate Filament, Tubulin, Endomembrane System

• School: University of Alberta
• Department: Biology (Biological Sciences)
• Course: BIOL107
• Professor: Torah Kachur

Document Summary

Biol 107 - lecture #14 - eukaryotic cell structure pt. Tubulin = dimer of tubulin + tubulin: function: compression resistant. Movement of: chromosome, vesicles, cells (ie. the flagellum, motor proteins. Proteins that change shape with atp hydrolysis and can generate force along cytoskeleton: mictrotubules associated motor proteins, kinesin a. (+) end directed microtubules motor monkey bar movement , dynein a. (-) end directed microtubule motor, example: eukaryote flagellum. Long and singular = flagellum: microfilaments actin filaments composed of actin monomers and is a double twisted chain of actin subunits, structure: polymers of actin, forms rope-like chain, function: tension (stretch) resistance, movement in. Muscular contraction: motor molecule: myosin, myosin is arranged into bipolar thick filaments in sarcomere. Can only actively shorten: all in antagonistic pairs iii. Intermediate filaments function in tension bearing (like mfs: not dynamic structure in cell, no associated motor proteins, heterogeneous polymers eg. keratin in hair/nails.