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Notes273-Jan31st.docx

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Department
Psychology
Course
PSYCH 101
Professor
n.a
Semester
Summer

Description
Which of the following are contractile proteins in skeletal muscle? a.troponin protein b.myosin proteins c. tropomyosin protein I band­isotropic: reflects light uniformly A band­anisotropic: scatter light unevenly Picture­ far left and far right=zline,  bottom left and bottom right= I band, A band is in  between I bands, on top of the a band is the H zone, middle bar is the m line Middle bottom line is called sarcomere.  Myofibril structure­ fig 12­3c &d So…why striations  Organization of the myofibril protein components  ­myosin, actin  myosin­ coiled protein molecules that have two important parts ▯ head&tail region  250 myosin molecules join▯think filament  study the structure with the myosin with one lighter be
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