Recombinant Human Cluster Of Differentiation 19 (CD19) is a purified Prokaryotic Protein. Purity: >80% by SDS-PAGE. Host: E. coli. Endotoxin Level: <1.0EU per 1ug, by the LAL method. Species: Human (Homo sapiens). Target Name: Cluster Of Differentiation 19 (CD19). Target Synonyms: B4, B-lymphocyte surface antigen B4, T-cell surface antigen Leu-12. Accession Number: P15391. Gene ID: 930. Expression Region: Ala160~Lys258. Tag Info: N-terminal His and GST Tag. Theoretical MW: 44kDa. Buffer: PBS, pH7.4, containing 0.01% SKL, 5% Trehalose. Storage: -20C. Avoid repeated freeze/thaw cycles. Restrictions: For Research Use Only. Not for use in diagnostic procedures.