ICAM-3/CD50, also known as CD50 (Cluster of Differentiation 50), is a member of the intercellular adhesion molecule (ICAM) family. All ICAM proteins are type I transmembrane glycoproteins, contain 2-9 immunoglobulin-like C2-type domains, and bind to the leukocyte adhesion LFA-1 protein. This protein is constitutively and abundantly expressed by all leukocytes and may be the most important ligand for LFA-1 in the initiation of the immune response. It functions not only as an adhesion molecule, but also as a potent signaling molecule. Source: Recombinant protein corresponding to aa30-485 from human ICAM-3/CD50, fused hIgG-His-Tag at C-terminal, was expressed in insect cell. AA Sequence: QEFLLRV EPQNPVLSAG GSLFVNCSTD CPSSEKIALE TSLSKELVAS GMGWAAFNLS NVTGNSRILC SVYCNGSQIT GSSNITVYRL PERVELAPLP PWQPVGQNFT LRCQVEDGSP RTSLTVVLLR WEEELSRQPA VEEPAEVTAT VLASRDDHGA PFSCRTELDM QPQGLGLFVN TSAPRQLRTF VLPVTPPRLV APRFLEVETS WPVDCTLDGL FPASEAQVYL ALGDQMLNAT VMNHGDTLTA TATATARADQ EGAREIVCNV TLGGERREAR ENLTVFSFLG PIVNLSEPTA HEGSTVTVSC MAGARVQVTL DGVPAAAPGQ PAQLQLNATE SDDGRSFFCS ATLEVDGEFL HRNSSVQLRV LYGPKIDRAT CPQHLKWKDK TRHVLQCQAR GNPYPELRCL KEGSSREVPV GIPFFVNVTH NGTYQCQASS SRGKYTLVVV MDIEAGSSH Biological Activity: Measured by the ability of the immobilized protein to support the adhesion of HL-60 human promyelocytic cells. When cells are added to Human ICAM-3/CD50 coated plates, the ED50 range 4ug/ml. 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 6 months after receipt at -20C. For maximum recovery of product, centrifuge the original vial after thawing and prior to removing the cap. Further dilutions can be made in assay buffer.