Purity > 90% as determined by SDS-PAGE. MW: 52.6kDa. Full Length: 1-340aa. N-terminal 6xHis-SUMO-tagged. Homo sapiens (Human). Catalyzes the synthesis of D-serine from L-serine. D-serine is a key coagonist with glutamate at NMDA receptors. Has dehydratase activity towards both L-serine and D-serine.