FromAncient Greekἀκτίς(aktís,“ray”), based on the shape of the filament formed, +-in.
actin (countable anduncountable,pluralactins)
- (biochemistry, uncountable) Aglobular structuralprotein thatpolymerizes in ahelical fashion to form an actinfilament (ormicrofilament).
- 2012, Elaine N. Marieb & Katja Hoehn,Human Anatomy & Physiology, 8th ed., chapter 9 "Muscles and Muscle Tissue", page 281.
- Actin has kidney-shaped polypeptide subunits, calledglobular actin orG actin, which bear the active sites to which the myosin heads attach during contraction.
- (biochemistry, countable) One of the sixisoforms of actin.
a globular structural protein
