Human transforming growth factor beta 1, (TGFβ1), also known as TGFbeta1 and TGFB1, GenBank Accession #NM_000660, a.a. 279-390(end), with a C-terminal Avi-tag and expressed in a HEK293 expression system. MW=15 kDa. This protein runs at a higher MW by SDS-PAGE due to glycosylation. This protein is enzymatically biotinylated using Avi-Tag™ technology. Biotinylation is confirmed to be ≥90%