Human MAT2A, also known as methionine adenosyltransferase II alpha, MAT2, S-adenosylmethionine synthase isoform type-2, and adoMet synthase 2. GenBank Accession No. NM_005911, a.a. 2-395 (end) with an N-terminal His-Avi-tag, expressed in an E. coli cell expression system. This protein is enzymatically biotinylated using Avi-tag™ technology MW = 45 kDa.