Uses
The antibody may be used for ELISA, competitive ELISA, immunoblotting (37 kDa), immunoprecipitation, immunocytochemistry (2% formaldehyde-acetone 1,2,5 or 10% formalin/methanol-1% NP-40 and microinjection (blocks the initiation of centrosome duplication) and immunohistochemistry. Reactivity has been observed with human, monkey, bovine, dog, hamster (weak), rat,kangaroo rat, and mouse B23.
General Description
B23 (also known as NPM, nucleophosmin, numatrin or NO38) is a phosphoprotein, widely expressed in all cell types, and localized in granular regions of the nucleolus associated with pre-ribosomal particles. This protein was found to be involved in several nuclear functions such as assembly and/or intranuclear transport of preribosomal particles, cytoplasmic/nuclear trafficking, regulation of DNA polymerase A activity and centrosome duplication. Phosphorylation of B23 is mediated by a cyclin complex, CDK2/cyclin E.
Phosphorylation causes the dissociation of B23 from the centrosome and enables the duplication of the centrosome during cell mitosis. B23 was also found to be involved in pro-myelocytic leukemia in which the gene for B23 fuses with retinoic acid receptor a (RARa). As a consequence, a fusion protein (60-7 0 kDa) is produced containing parts of the two genes.
