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Orexin B, rat, mouse Acetate

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Orexin B, rat, mouse Acetate (Rat orexin B) is an endogenous agonist at Orexin receptor with Kis of 420 and 36 nM for OX
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Description Orexin B, rat, mouse Acetate (Rat orexin B) is an endogenous agonist at Orexin receptor with Kis of 420 and 36 nM for OX1 and OX2, respectively.
In vitro Orexin B 通过前体蛋白——预前体orexin的蛋白酶水解作用产生,该前体蛋白由位于人类第17号染色体q21区域的基因编码。在放射配体结合研究中,Orexin B 对OX2受体具有更高的亲和力[1]。与啮齿类序列相比,人类Orexin B 有两个氨基酸的替换。事实上,OX2受体是人类orexin B的高亲和力受体,在结合测定中的IC50为36 nM,在[Ca2+]i瞬态测定中的EC50为60 nM。相比之下,人类Orexin B 对人类OX1的亲和力明显较低,竞争性结合测定计算得出的IC50为420 nM,而在[Ca2+]i瞬态测定中的EC50为2500 nM[2]。
In vivo 人体Orexin B显著增加食物摄入量;在2小时时间点,3 nM和30 nM的Orexin-B分别观察到食物消耗量增加5倍和12倍[2]。
Target activity OX2:36 nM, OX1:420 nM
Synonyms Rat orexin B, Orexin B (mouse) Acetate, Orexin B, rat, mouse Acetate(202801-92-1 free base)
molecular weight 2996.45
Molecular formula C128H219N45O36S
Storage keep away from moisture | Powder: -20°C for 3 years | In solvent: -80°C for 1 year
Solubility DMSO: Insoluble H2O: 2.5 mM
References 1. Smart D, et al. Orexins: a new family of neuropeptides. Br J Anaesth. 1999 Nov;83(5):695-7.