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J Biochem. 1981 Apr;89(4):1341-4.

Purification from starfish eggs of a protein that depolymerizes actin.


A protein which is capable of depolymerizing F-actin was purified from an extract of unfertilized starfish eggs by the use of DEAE-cellulose column chromatography and hydroxylapatite column chromatography. This protein has an apparent molecular weight of 17,000. It inhibited the extent of actin polymerization as well as depolymerizing F-actin rapidly. It was shown that this protein reacts with actin at a molar ratio of 1 : 1. The properties of this protein were compared with those of profilin from mammalian tissues.

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