Meaning of actomyosin in English:


Pronunciation /ˌaktəˈmʌɪə(ʊ)sɪn/


mass nounBiochemistry
  • A complex of actin and myosin of which the contractile protein filaments of muscle tissue are composed.

    ‘It has been recognized that various NTPs have different affinities for actomyosin, and myosins complexed with these NTPs or their products have different affinities for actin.’
    • ‘We have a worm whose body wall is a collagenous membrane and whose engine is the muscle protein actomyosin.’
    • ‘We presented evidence implicating actin polymerization and not actomyosin activity as the dominant mechanism actuating the stiffening response.’
    • ‘When muscles contract, electrical impulses cause the two proteins to slide past each other and bond, forming a complex molecule known as actomyosin, shortening and holding the position.’
    • ‘The lower actomyosin content of immature fibers compared to mature adult skeletal muscle fibers may account for this observation.’


1940s from actin+ myosin.