Thiosulfate:cyanide sulfurtransferase (rhodanese), also known as glpE, is a mitochondrial matrix enzyme that is encoded by the nucleus. glpE catalyzes the sulfur-transfer reaction in which a sulfur atom is transferred from thiosulfate to cyanide by a double-displacement mechanism. Escherichia coli glpE is a prototype for the single-domain rhodanese superfamily. Recombinant E.coli glpE protein, fused to His-tag at N-terminus, was expressed in E.coli and purified by using conventional chromatography techniques.