Estrogen-induced protein in the rat uterus: association with actin

The affinity of the estrogen-induced protein, IP, for reconstituted F-actin in uterine homogenates was investigated. The results demonstrate that a significant proportion of a 46 K protein, of which the rate of synthesis is increased by estrogen, two properties of BB-CK, co-sedimented with in vitro re-polymerized actin.