|Reactivity||Human, Mouse, Rat|
|Calculated MW||25247 Da|
|Homology||Mouse - identical; human - 11/14 amino acid residues identical.|
|Other Names||Sodium channel subunit beta-4, Scn4b|
|Related products for control experiments||Control peptide antigen (supplied with the antibody free of charge).|
|Target/Specificity||Peptide (C)KNDKSDPKVRVKDD, corresponding to amino acid residues 85-98 of rat NaV־²4 (Accession Q7M730). Extracellular, N-terminus.|
|Peptide Confirmation||Confirmed by mass-spectrography and amino acid analysis.|
|Format||Affinity purified antibody, lyophilized powder|
|Reconstitution||50 µl or 0.2 ml deionized water, depending on the sample size.|
|Antibody Concentration After Reconstitution||0.85 mg/ml.|
|Storage Before Reconstitution||Lyophilized powder can be stored intact at room temperature for several weeks. For longer periods, it should be stored at -20°C.|
|Storage After Reconstitution||The reconstituted solution can be stored at 4ºC for up to 2 weeks. For longer periods, small aliquots should be stored at -20ºC or below. Avoid multiple freezing and thawing. The further dilutions should be made using a carrier protein such as BSA (1%). Centrifuge all antibody preparations before use (10000 × g 5 min).|
|Control Antigen Storage Before Reconstitution||Lyophilized powder can be stored intact at room temperature for several weeks. For longer periods, it should be stored at -20°C.|
|Control Antigen Reconstitution||100 µl DDW.|
|Control Antigen Storage After Reconstitution||-20ºC.|
|Preadsorption Control||1 µg peptide per 1 µg antibody.|
|Formulation||Lyophilized powder. Resuspended antibody contains phosphate buffered saline (PBS), pH 7.4, 1% BSA, 0.05% NaN3.|
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Provided below are standard protocols that you may find useful for product applications.
Voltage-gated sodium channels (NaV) are essential for the generation of action potentials and for cell excitability1. NaV channels are activated in response to depolarization and selectively allow flow of Na+ ions. To date, nine NaV α subunits have been cloned and named Nav1.1-Nav1.94,5. The Nav channels are classified into two groups according to their sensitivity to Tetrodotoxin (TTX): TTX-sensitive (NaV1.1, NaV1.2, NaV1.3, NaV1.4, NaV1.6 and NaV1.7) and TTX-resistant (NaV1.5, NaV1.8 and NaV1.9) 2,3. Mammalian Na+ channels are heterotrimers, composed of a central, pore-forming α subunit and two auxiliary β subunits. The expression of the α subunit isoform is developmentally regulated and tissue specific. Na+ channels in the adult central nervous system and heart contain β1 through β4 subunits, whereas Na+ channels in adult skeletal muscle have only the β1 subunit6,7. Navβ4 has been associated with Long QT syndrome8 and with Huntington's disease, showing a distinct down regulation of NaVβ4 in the presymptomatic stage of HD mice, whereas other voltage-gated ion channel subunits were later decreased9.
References 1. Wu, L. et al. (2002) NeuroReport 13, 2547. 2. Fang, X. et al. (2002) J. Neurosci. 22, 7425. 3. Fjell, J. et al. (2000) NeuroReport 11, 199. 4. Baker, M.D. and Wood, J.N. (2001) Trends Pharmacol. Sci. 22, 27. 5. Lai, J. et al. (2003) Curr. Opin. Neurobiol. 13, 291. 6. Isom, L.L. (2001) Neuroscientist 7, 42. 7. Catterall, W.A. et al. (2003) Pharmacol. Rev. 55, 575. 8. Medeiros-Domingo, A. et al. (2007) Circulation 116, 134. 9. Oyama, F. et al. (2006) J. Neurochem. 98, 518.
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