Recombinant Human Collagen Type I Alpha 1 (COL1a1) is a purified Prokaryotic Protein. Purity: >95% by SDS-PAGE. Host: E. coli. Endotoxin Level: <1.0EU per 1ug, by the LAL method. Species: Human (Homo sapiens). Target Name: Collagen Type I Alpha 1 (COL1a1). Target Synonyms: COL-1A1; COL1-A1; COL1A-1; OI4; Collagen Alpha-1(I)chain. Accession Number: P02452. Gene ID: 1277. Expression Region: Arg253~Ala471. Tag Info: N-terminal His Tag. Theoretical MW: 27kDa. Buffer: PBS, pH7.4, containing 0.01% SKL, 5% Trehalose. Storage: -20°C. Avoid repeated freeze/thaw cycles. Restrictions: For Research Use Only. Not for use in diagnostic procedures.