The Human IL-4 yeast-derived recombinant protein is not tagged and is naturally endotoxin-free. The purity is greater than 98% as visualized by SDS-PAGE analysis. Human IL-4 applications are for cell culture, ELISA standard, and Western Blot Control. The Human IL-4 yeast-derived recombinant protein can be purchased in multiple sizes. Human IL-4 Specifications: (Molecular Weight: 15.0 kDa) (Amino Acid Sequence: HKCDITLQEI IKTLNSLTEQ KTLCTELTVT DIFAASKNTT EKETFCRAAT VLRQFYSHHE KDTRCLGATA QQFHRHKQLI RFLKRLDRNL WGLAGLNSCP VKEANQSTLE NFLERLKTIM REKYSKCSS (129)) (Gene ID: 3565). For research use only. Made in the USA