Spindles formed during mitosis and meiosis are nothing, but micro-tubule complex, Micro-tubules are made up of small units of tubulin which has an amino acid composition similar to actin.
Myosin: A protein that makes up the thick myofilaments in muscle fibre.
Actomyosin: Complex formed when the pure proteins actin and myocin are mixed.
Myoglobin: Conjugated protein of vertebrates striated and cardiac muscle fibres.