A region of a sarcomere that appears as a light band on each side of the Z disc, comprising a region of the sarcomere where thin (actin) filaments are not overlapped by thick (myosin) filaments; contains actin, troponin, and tropomyosin; each sarcomere includes half of an I band at each end. [ https://www.worldcat.org/search?q=bn%3A0321204131 ]
Synonyms: J disc isotropic disc I disc
This is just here as a test because I lose it