Assertion: muscle fiber's filament | /r/Causes | conformational change
Facets:
value: in the troponin-tropomyosin complexes
type: LOCATION
Source sentences:
text: When cytosolic calcium increases it binds to TnC in the thin filament causing a conformational change in the troponin-tropomyosin complexes such that myosin binding sites on actin become available.