Assertion: muscle fiber's sarcomere | /r/HasProperty | mediated by protein
Facets:
Source sentences:
text: - zone of myosin filaments only (no overlap with actin filaments) within the A-band, Z-line - zone of apposition of actin filaments belonging to two neighbouring sarcomeres (mediated by a protein called alpha-actinin),
text: - zone of apposition of actin filaments belonging to two neighbouring sarcomeres (mediated by a protein called alpha-actinin), M-line - band of connections between myosin filaments (mediated by proteins, e.g. myomesin, M-protein).