SIRPB1, also known as signal-regulatory protein beta-1 isoform 1, is a type I transmembrane protein of SIRP superfamily. It is an immunoglobulin-like cell surface receptor involved in the negative regulation of receptor tyrosine kinase-coupled signaling processes. This protein also participates in the recruitment of tyrosine kinase SYK. And it acts as an activating isoform of SIRP alpha molecules that recruit SHP-1 and SHP-2 protein tyrosine phosphatases and activate counterparts, whose engagement couples to protein tyrosine kinases. Recombinant human SIRPB1, fused to His-Tag at C-terminal, expressed in Insect Cell and purified by using conventional chromatography techniques. Source: Recombinant protein corresponding to aa30-371 from human SIRPB1, fused to His-Tag at C-terminal, expressed in Insect Cell. Molecular Weight: ~38.0kD (348aa) ~40-57kD (SDS-PAGE under reducing conditions.) AA Sequence: EDELQVIQPE KSVSVAAGES ATLRCAMTSL IPVGPIMWFR GAGAGRELIY NQKEGHFPRV TTVSELTKRN NLDFSISISN ITPADAGTYY CVKFRKGSPD DVEFKSGAGT ELSVRAKPSA PVVSGPAVRA TPEHTVSFTC ESHGFSPRDI TLKWFKNGNE LSDFQTNVDP AGDSVSYSIH STARVVLTRG DVHSQVICEI AHITLQGDPL RGTANLSEAI RVPPTLEVTQ QPMRAENQAN VTCQVSNFYP RGLQLTWLEN GNVSRTETAS TLIENKDGTY NWMSWLLVNT CAHRDDVVLT CQVEHDGQQA VSKSYALEIS AHQKEHGSDI THEAALAPTA PLHHHHHH 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.
