Purity: > 85 % by SDS - PAGE Format: Liquid. In 20mM Tris-HCl buffer(pH 8.0) 1M urea, 5% Glycerol.. TuBG1 is a member of the tubulin superfamily. This protein localizes to the centrosome where it binds to microtubules as part of a complex referred to as the gamma-tubulin ring complex. It mediates microtubule nucleation and is required for microtubule formation and progression of the cell cycle. Recombinant human TuBG1 protein, fused to His-tag at N-terminus, was expressed in E.coli.