MW: 48.1 kDa (455aa) confirmed by MALDI-TOF. Purity >90% by SDS-PAGE. OXSM is a beta-ketoacyl synthetase. The enzyme is required for elongation of fatty acid chains in the mitochondria. Alternatively spliced transcript variants have been described. Recombinant human OXSM protein, fused to His-tag at N-terminus, was expressed in E Coli and purified by using conventional chromatography techniques.