Assertion: muscle fiber's filament | /r/MadeOf | actin
Facets:
Source sentences:
text: Thin filaments are made of actin and attach at Z lines which help them line up correctly with each other.
text: These filaments are basically just long protein ropes (made of actin and myosin) that contract to force your skeleton to move.
text: Thin filaments are made of actin and attach at Z lines which help them line up correctly with each other.