IL21, also known as interleukin-21 isoform 1, is a T-helper cytokine that regulates humoral immunity and cell-mediated anti-tumor responses. It has broad immunoregulatory activity and can modulate both humoral and cell-mediated responses. It is important in the regulation of hematopoiesis and immune responses, and can influence lymphocyte development. It is produced by activated T cells, and it influences proliferation of T and B cells and cytolytic activity of natural killer cells. It may be a critical factor in the control of persistent viral infections. It has a potential predicating significance for survival time in patients in the development of sporadic CRC. It binds to the IL-21R and can activate Janus kinase JAK1, JAK3, STAT1, and STAT3 in EDgamma-16 cells. Recombinant protein corresponding to aa30-162 from human IL21, fused to His-Tag at C-terminal, expressed in Insect Cell. Molecular Weight: ~16.9kD (145aa) ~18-28kD (SDS-PAGE under reducing conditions) AA Sequence: ADPEFMQGQD RHMIRMRQLI DIVDQLKNYV NDLVPEFLPA PEDVETNCEW SAFSCFQKAQ LKSANTGNNE RIINVSIKKL KRKPPSTNAG RRQKHRLTCP SCDSYEKKPP KEFLERFKSL LQKMIHQHLS SRTHGSEDSH HHHHH Endotoxin: <1EU/1ug (LAL) Storage and Stability: May be stored at 4C for short-term only. Aliquot to avoid repeated freezing and thawing. Store at -20C. Aliquots are stable for 12 months after receipt. For maximum recovery of product, centrifuge the original vial after thawing and prior to removing the cap.
