Purity: > 95% by SDS - PAGE Format: Liquid. In 20mM Tris-HCl buffer (pH 8.0) containing 1mM DTT, 10% glycerol. Rho GDP-dissociation inhibitor 1, also known ARHGDIA, belong to the RAS gene superfamily encoding small guanine nucleotide exchange (GTP/GDP) factors. Localized to the cytoplasm, ARHGDIA inhibits the dissociation of GDP from Rho proteins, thereby preventing GTP from binding to and subsequently activating Rho proteins. In humans ARHGDIA can be phosphorylated at Ser 101 by p21-activated kinase, an event that inhibits ARHGDIA activity and may result in positive feedback regulation of certain ARHGDIA target proteins. Recombinant human ARHGDIA protein, fused to His-tag at N-terminus, was expressed in E.coli and purified by using conventional chromatography techniques.