Purity > 90% as determined by SDS-PAGE. MW: 63.4kDa. Full Length of Mature Protein: 2-561aa. N-terminal 6xHis-tagged. Mus musculus (Mouse). Hydro-lyase catalyzing the first step of the transsulfuration pathway, where the hydroxyl group of L-serine is displaced by L-homocysteine in a beta-replacement reaction to form L-cystathionine, the precursor of L-cysteine. This catabolic route allows the elimination of L-methionine and the toxic metabolite L-homocysteine (By similarity). Also involved in the production of hydrogen sulfide, a gasotransmitter with signaling and cytoprotective effects on neurons