Actin
/ˈæktɪn/
"Actin" in a Sentence (2 examples)
Actin is a protein very important to the health of a cell.
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, called globular actin or G actin, which bear the active sites to which the myosin heads attach during contraction.