What is the cross arm in the heavy meromyosin (HMM) component?
What is the cross arm in the heavy meromyosin (HMM) component?
Tail
Head and short arm projecting outwards at regular distance and angle from each other
Filamentous actin
Troponin
Solution
The cross arm in the HMM component refers to the head and short arm projecting outwards at regular distance and angle from each other from the surface of a polymerised myosin filament.