M line


M line

a fine line in the center of the A band of the sarcomere of striated muscle myofibrils. Synonym(s): M band, mesophragma

M line

(līn) A fine line in the center of the A band of the sarcomere of striated muscle myofibrils.
Synonym(s): M band.

M line

In high power micrographs of striated muscle, the thin, dark line in the center of the H band of a sarcomere. It contains myomesin (a protein that connects thick (myosin) filaments), C protein, and creatinine kinase. Synonym: M band; M diskSee also: line