Actin and myosin
Page
2

Ca2+

Slide 21

Ca2+

the myosin heads change position to achieve a lower energy state and slide the actin filaments past the stationary myosin

Slide 22

Ca2+

Slide 23

Ca2+

Slide 24

Ca2+

ATP binds to the bulbous heads and causes it to become detached

Slide 25

Ca2+

ATP binds to the bulbous heads and causes it to become detached

Slide 26

Ca2+

hydrolysis of ATP provides the energy to “re-cock” the heads

Slide 27

Ca2+

hydrolysis of ATP provides the energy to “re-cock” the heads

Slide 28

Ca2+

Slide 29

Ca2+

calcium ions are re-absorbed back into the T system

Slide 30

Ca2+

calcium ions are re-absorbed back into the T system

Slide 31

Ca2+

the troponin reverts to its normal shape and the tropomyosin move back to block the myosin binding sites

Slide 32

Ca2+

the troponin reverts to its normal shape and the tropomyosin move back to block the myosin binding sites

Slide 33

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Actin and myosinPage 2