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I band

 

Definition: a light band on each side of the Z line of striated muscle fibers, comprising a region of the sarcomere where thin (actin) filaments are not overlapped by thick (myosin) filaments.

Synonym(s): I disc, isotropic disc

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© Copyright 2017 Wolters Kluwer. All Rights Reserved. Review Date: Sep 19, 2016.
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