Answer: actins

AnswerCrossword Clue
ACTINSMuscle proteins
actinsACTIN, a protein in muscle tissue
actinsglobulin that is present in muscle plasma and that in connection with myosin plays an important role in muscle contraction
actinsa cellular protein found especially in microfilaments (as those comprising myofibrils) and active in muscular contraction, cellular movement, and maintenance of cell shape