MAP-2 (microtubule associated protein-2) is one of several high molecular weight proteins that play an important role in brain neuron microtubule assembly. In addition to its association with microtubules, MAP-2 associates with neurofilaments and actin filaments suggesting that it may guide interaction among microtubules, other cytoskeletal elements, and cytoplasmic organelles. MAP-2 is a stringent marker for neurons. In addition, MAP-2 displays intracellular specificity. In the central nervous system, MAP-2 is confined to neuronal cell bodies and dendrites. There are exceptions, however, where some axons stain positive for small amounts of MAP-2. MAP-2 is uniformly distributed throughout the cell when first expressed in cultured neurons but becomes selectively localized as dendritic development proceeds. (Caceres, 1986; Dotti, 1987).
Synonyms: Microtubule Associated Protein, MAP2A and 2B
Storage: 2-8C
Application: Western Blot: 60 ng/mL. In SDS-PAGE, MAP-2 from adult rat migrates as a closely associated doublet having a molecular weight of approximately 280-300 kD representing the MAP-2A and -2B isoforms but not the 70 kDa MAP-2C isoform. However, early in brain development (postnatal day 10 in rats), MAP-2 migrates as a single band that is identical to the lower molecular weight band of the adult MAP-2 doublet (MAP-2b). Later in development (postnatal days 17-18), the mobility of MAP-2 changes to the adult doublet form. (In the spinal cord, conversion to the adult form occurs earlier). Users should run 4%-20% SDS-PAGE gradient gels. Immunohistochemistry: 5 µg/mL (4% PFA fixed frozen sections). Immunohistochemistry: 5 µg/mL of a previous lot was used. Anti-MAP-2 can be used to stain tissue (brain or spinal cord) fixed with paraformaldehyde.Optimal working concentrations must be determined by the end user.
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Other Notes: Concentration: Please refer to the Certificate of Analysis for the lot-specific concentration.