Technical Data
Connexin 26 (CX26, Gap Junction Beta 2 Protein, CXB-2)
Intracellular communication mediated by gap junctions plays an important role in a variety of cellular processes including: homeostasis, morphogenesis, cell differentiation, and growth control. Gap junctions are transmembrane channels that serve to directly link neighboring cells by mediating the exchange of low-molecular weight metabolites, ions, and second messengers. Gap junctions are formed by the interaction of connexons or hemichannels on adjacent cells. The connexon itself is composed of a hexameric assembly of proteins referred to as connexins. Connexins are highly homologous proteins encoded by a multigene family. The connexins exhibit similar structural features which include a cytoplasmic amino terminal region, four transmembrane domains, two extracellular loops, and a carboxyl-terminal cytoplasmic tail of varying length (4,5). Comparison of the amino acid sequences of the various connexin family members indicate that the two areas of greatest divergence amongst the connexin family members are the intracellular loop connecting the second and third transmembrane segments and the carboxy-terminal tail (4,5). These domains are, therefore, thought to mediate connexin-type speci c properties including: phosphorylation, responses to gating stimuli, as well as assembly and membrane turnover. Modulation of gap junctional communication can be achieved by multiple mechanisms and can occur very rapidly or over a period of several hours. These mechanisms include alterations in transcription, translation, stability, postranslational processing (especially phosphorylation), gating, and insertion or removal from the plasma membrane. Interestingly, reduction or alterations in the levels or types of connexin expressed in a given cell type has been found to correlate with tumor progression and metastasis (8).

Suitable for use in ELISA, Western Blot and Immunohistochemistry. Other applications not tested.

Recommended Dilutions:
ELISA: 0.1-1ug/ml
Western Blot: 1ug/ml. Reactivity con rmed using extracts from mouse liver, mouse brain and rat brain.
Immunohistochemistry (Frozen): 1-2ug/ml
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 after receipt. For maximum recovery of product, centrifuge the original vial after thawing and prior to removing the cap.
MabIgG1,k3G100Affinity Purified
100ug-20CBlue IceRatMouse
Synthetic peptide corresponding to a segment of the cytoplasmic loop of rat Connexin-26.
Purified by immunoaffinity chromatography.
Supplied as a liquid in PBS, pH 7.4, 0.09% sodium azide.
Recognizes rat Connexin-26 at ~26.5kD. Exhibits minimal crossreaction with Cx30 by Western Blot. The degree of crossreaction with Cx30 by IHC is uncertain, but may be in uenced by xation conditions. Species Crossreactivity: mouse and human
Intended for research use only. Not for use in human, therapeutic, or diagnostic applications.
1. Nagy, J.I., et al., Neuroscience 78: 533-548 (1997). 2. Nagy, J.I., et al., J. Comp. Neurol. 441: 302-323 (2001). 3. Dahl, E., et al., J. Biol. Chem. 271: 17,903-17,910 (1996). 4. Hertzberg, E.L., et al., Cell 39: 61-69 (1984). 5. Zhang, J.T., et al., J. Cell. Biol. 109: 3391-3401 (1989). 6. Saez, J.C., et al., In Advances in Second Messenger and Phosphoprotein Research; eds S., Shenolikar and A., Narin. Raven Press, New York (1993). 7. Bennet, M.V.L., et al., Neuron 6: 305-320 (1990). Wilgenbus, KK., et al., Int. J. Cancer 51: 522-529 (1992). 8. Kuraoka, A., et al., J. Histochem. Cytochem. 41: 971-980 (1993). 9. Davis, L.M., et al., J. Amer. Coll. Cardiol. 24: 1124-1132 (1994). 10. You, et al., Cancer Research 58: 1498-1502 (1998). 11. Nagy, J.I., et al., Neuroscience, In Press (1998). 12. Rouan, F., et al., J. Cell Sci. 114: 2105-2113 (2001).