p21-ARC is part of a complex implicated in the control of actin polymerization in cells. It belongs to a complex composed of ARP2, ARP3, ARPC1, ARPC2, ARPC3, ARPC4 and ARPC5, collectively known as the ARPC3 family. p21-ARC is implicated as an important regulator of growth cone translocation, especially in the CNS (Strasser et al, 2004).
[1] "Mammalian actin-related protein 2/3 complex localizes to regions of lamellipodial protrusion and is composed of evolutionarily conserved proteins."Machesky L.M., Reeves E., Wientjes F., Mattheyse F.J., Grogan A., Totty N.F., Burlingame A.L., Hsuan J.