Actin binding sites are located on
Troponin
Tropomyosin
Meromyosin
Both b and c
Actin belongs to the family of globular multifunctional protein that forms microfilaments in muscle fibers. The associated proteins along with actin found in thin filaments are troponin and tropomyosin.however the binding sites are located in meromyosin.Hence, the correct option is (c).