α-Bungarotoxin, Bungarus multicinctus Blocks neuromuscular transmission by irreversible binding to motor end-plate acetylcholine receptor (Kd = 1 pM to 1 nM) but does not depress acetylcholine release from motor nerve endings. Blocks nicotine-induced increase of intracellular Ca2+ in PC12 cells (IC50 = 310 nM), and prevents opening of nicotinic receptor-associated ion channels. Reconstitution experiments in Xenopus oocytes have shown the effects of α-bungarotoxin on neuronal nAChR to be highly specific for the α7-subtype (IC50 = 1.6 nM), but not for the α3β4-subtype (IC50 >3 µM). 产品信息 Peptide Sequence H-Ile-Val-Cys3-His-Thr-Thr-Ala-Thr-Ser-Pro-Ile-Ser-Ala-Val-Thr-Cys¹6-Pro-Pro-Gly-Glu-Asn-Leu-Cys23-Tyr-Arg-Lys-Met-Trp-Cys29-Asp-Ala-Phe-Cys33-Ser-Ser-Arg-Gly-Lys-Val-Val-Glu-Leu-Gly-Cys44-Ala-Ala-Thr-Cys48-Pro-Ser-Lys-Lys-Pro-Tyr-Glu-Glu-Val-Thr-Cys59-Cys60-Ser-Thr-Asp-Lys-Cys65-Asn-Pro-His-Pro-Lys-Gln-Arg-Pro-Gly-OH (disulfide bonds: 3 → 23; 16 → 44; 29 → 33; 48 → 59; 60 → 65) Form Lyophilized solid Molar mass 7984.3 Contaminants None detectable by IEF. Supplied as an acetate salt Solubility H2O or PBS Chemical formula C338H529N97O105S11 RTECS EI6201400 CAS number 11032-79-4 Merck USA index 14, 1488 商店和运输信息 Storage -20°C Ship Ambient Temperature Only Harmful 安全标示 S Phrase S: 36 Wear suitable protective clothing. R Phrase R: 20/21/22 Harmful by inhalation, in contact with skin and if swallowed.