Technical Data
030119
CRYAB
Description:
Crystallin, alpha B. Crystallins are separated into two classes: taxon-specific, or enzyme, and ubiquitous. The latter class constitutes the major proteins of vertebrate eye lens and maintains the transparency and refractive index of the lens. Since lens central fiber cells lose their nuclei during development, these crystallins are made and then retained throughout life, making them extremely stable proteins. Mammalian lens crystallins are divided into alpha, beta, and gamma families; beta and gamma crystallins are also considered as a superfamily. Alpha and beta families are further divided into acidic and basic groups. Seven protein regions exist in crystallins: four homologous motifs, a connecting peptide, and N- and C-terminal extensions. 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 (sHSP also known as the HSP20) family. They act as molecular chaperones although they do not renature proteins and release them in the fashion of a true chaperone; instead they hold them in large soluble aggregates. Post-translational modifications decrease the ability to chaperone. 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-A and alpha-B gene products are differentially expressed; alpha-A is preferentially restricted to the lens and alpha-B is expressed widely in many tissues and organs. Elevated expression of alpha-B crystallin occurs in many neurological diseases; a missense mutation cosegregated in a family with a desmin-related myopathy.

Applications:
Western Bloting: 1:500-1:2000.
Immunohistochemistry: 1:200-1:1000.
ELISA: Suggested dilution 1:10000.
Optimal dilutions to be determined by the researcher.

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. For maximum recovery of product, centrifuge the original vial after thawing and prior to removing the cap.
TypeIsotypeCloneGrade
MabIgG2a13B197
SizeStorageShippingSourceHost
100ul-20CBlue IceHumanMouse
Concentration:
Not determined
Immunogen:
Purified recombinant fragment of CRYAB (aa1-175) expressed in E. coli.
Purity:
Ascites
Form
Ascites fluid, 0.03% sodium azide.
Specificity:
Human
Intended for research use only. Not for use in human, therapeutic, or diagnostic applications.
1. Cell. 2007 Aug 10;130(3):427-39.
2. Biochemistry. 2006 Nov 21;45(46):13847-54.
3. J Mol Biol. 2007 Sep 14;372(2):470-84.