ANATOMY LECTURE 6 - 2/7/11 Lecture Notes Slide 1...

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2/7/11 Lecture Notes Slide 1 Actin-Myosin orientation Thin Filament Control o One to six relationship of myosin to actin for any ONE myosin Actually one to six when looking at the whole Tropomyosin: lies along actin in the groove formed by the DOUBLE HELIX Inhibits actin-myosin interaction Troponin – embedded at regular intervals along acting Interacts with Ca++ Moves tropomyosin, uncovering active actin sites What is the function of troponin? What is the function of the SR? Controls calcium levels in cytoplasm – how does this relate? Rigor Mortis – what is it dependant on? (Hint – 2 things) o Ca++ pumping o Disassociation of myosin from actin Both of these are dependent upon ATP and in death there is no ATP production. That is why rigor takes hours to occur since ATP can be made in the absence of O 2 for a short while. Actin – series of globular proteins to form a filament and two filaments twisted in a double helix. Troponin – three subunits – know them and what they do
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This note was uploaded on 04/02/2012 for the course KIN 324K taught by Professor Farrar during the Spring '08 term at University of Texas at Austin.

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ANATOMY LECTURE 6 - 2/7/11 Lecture Notes Slide 1...

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