CD44 (clone BRIC 222) Affinity Purified, anti-human

Decription:
Mouse monoclonal antibody to human CD44 Affinity purified. CD44 (also known as Pgp-1, ECMR III, Hermes antigen, p801, H- CAM) is a cell membrane glycoprotein of apparent molecular weight 80 kDa. The full amino acid sequence has been deduced from cDNA. It is heavily glycosylated with both N- and O- glycans. The extracellular part of CD44 comprises an N- terminal disulphide bonded domain and an O- glycosylated domain. CD44 carries the Ina and Inb blood group antigens. There is a strong association between CD44 and the cytoskeleton. CD44 is thought to be involved in mediating cell:cell adhesion particularly lymphocyte- endothelial cell interactions important for lymphocyte migration from blood to lymph nodes and mucosal associated lymph organs. CD44 is a member of the hyaladherin family of hyaluronan-binding proteins, with a structure similar to selectins, and is the principal cell surface receptor for Hyaluronate. Antibodies in CD44 may facilitate haemopoietic engraftment4. CD44 also functions as an adhesion, hyaluronan, fibronectin, osteopontin and MIP-1b receptor and as a co-stimulatory molecule. CD44 is found on a broad range of haemopoietic cells such as lymphoid cells, myeloid cells, fibroblasts, endothelial cells, epithelial cells, erythroid cells and the nervous system, but not platelets5. It is found on brain, heart, liver, thymus, kidney and colon epithelium. CD44 has been mapped to chromosome 11p. There are approximately 10,000 CD44 molecules per erythrocyte.

Synonyms: CD44, Pgp-1, ECMR III, Hermes antigen, p801, H-CAM

Clone: BRIC 222

Isotype: Mouse IgG1 kappa light chain

Immunogen: Purified CD44 from human hemopoietic cells.

Reactivity: human

Form: Affinity purified, in 0.1 M glycine buffer, 1 M Tris buffer, pH 7.4, sterile filtered

Applications: Immunoblotting, ELISA

Working Dilution: It has a functional binding affinity to erythrocytes of 3.8 x 10^8M-1.

Storage: 2-8C for immediate use, or at -20C (aliquot)

References:
1. Haynes, B.F. et al., (1989) Immunol. Today ,10, pp423-428 (Review).
2. Spring, F.A., et al. (1988) Immunology ,64, pp 37-43
3. Aruffo, A., et al. (1990) Cell, 61, pp 1303-1313
4. Sandmaier, B.M. et al. (1990),76, pp 630-635
5. Stoll, M. et al. (1989), in Leucocyte typing IV; White cell Differentiation Antigens, Ed. W. Knapp et al., Oxford University Press,pp
6. Anstee DJ et al. (1991) Immunology, 74: 197-205
7. Spring et al. (1993) Proceedings of the fifth workshop and conference on white cell differentiation antigens, Boston, vol. 2p 1738-1740.