Purity: > 90% by SDS - PAGE Format: Liquid. In 20 mM Tris-HCl Buffer (pH 8.0) containing 10% Glycerol. CYGB is a globin molecule located in the brain and most notably utilized in marine mammals. It is thought to be a method of protection under conditions of hypoxia. The predicted function of cytoglobin is the modulation of oxygen and nitric oxide metabolism or scavenging free radicals within a cell. Recombinant human CYGB, fused to His-tag at N-terminus, was expressed in E.coli and purified by using conventional chromatography.