Ibåndet
Ibåndet, or the I-band, is a region of the sarcomere in striated muscle that contains only thin actin filaments and no overlap with thick myosin filaments. It lies on either side of the Z-disc and is the lighter-staining band seen in transverse muscle sections.
The I-band is bounded by the Z-disc on the inner side and by the edge where thick
Actin filaments are the main components of the I-band, along with associated regulatory proteins such as tropomyosin
Functionally, the I-band shortens during muscle contraction as the thin and thick filaments slide past each
Ibåndet is present in both skeletal and cardiac muscle and contrasts with the neighboring A-band, which contains