part of
part_of
part of
anatomical entity
anatomical entity
sarcomere
I band
GO:0031674
cellular_component
isotropic disc
J disc
Wikipedia:Sarcomere#bands
I disc
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.
cellular anatomical entity