Purity: > 80% by SDS - PAGE Format: Liquid. In 20 mM Tris-HCl buffer (pH8.0) containing 10% glycerol, 0.15M NaCl . CHGB, also known as secretogranin-1 or chromogranin-B, is a neuroendocrine secretory granule protein, which may be the precursor for other biologically active peptides. This protein Belongs to the chromogranin/secretogranin protein family and is expressed in the adrenal medulla, and in pheochromocytoma. Recombinant CHGB protein was expressed in E.coli and purified by using conventional chromatography techniques.