Purity ~95% by SDS PAGE; Purified by using conventional chromatography techniques. Alpha crystallins are composed of two gene products; alpha-A and alpha-B, for acidic and basic, respectively. Alpha crystallins can be induced by heat shock and are members of the small heat shock protein family (sHSP also known as HSP20). They act as molecular chaperones and hold them in large soluble aggregates. These heterogeneous aggregates consist of 30-40 subunits; the alpha-A and alpha-B subunits have a 3:1 ratio, respectively. Two additional functions of alpha-crystallins are an autokinase activity and participation in the intracellular architecture. Alpha-B is expresssed widely in many tissues and organs and occurs in many neurological diseases. Recombinant protein corresponding aa1-175 of human Crystallin, alpha B expressed in E. coli (NP_001876). Amino Acid Sequence: MDIAIHHPWI RRPFFPFHSP SRLFDQFFGE HLLESDLFPT STSLSPFYLR PPSFLRAPSW FDTGLSEMRL EKDRFSVNLD VKHFSPEELK VKVLGDVIEV HGKHEERQDE HGFISRE