| 中文名 | 食欲肽B (人) |
| 英文名 | OREXIN B(HUMAN) |
| 别名 | 食欲肽B (人) 人OREXINB |
| 英文别名 | HYPOCRETIN-2 OREXIN B(HUMAN) HYPOCRETIN-2,HUMAN Orexin B (huMan)Hypocretin-2 (huMan) ARG-SER-GLY-PRO-PRO-GLY-LEU-GLN-GLY-ARG-LEU-GLN-ARG-LEU-LEU-GLN-ALA-SER-GLY-ASN-HIS-ALA-ALA-GLY-ILE-LEU-THR-MET-NH2 |
| CAS | 205640-91-1 |
| 化学式 | C123H212N44O35S |
| 分子量 | 2899.34 |
| 存储条件 | -20°C |
| 体外研究 | Orexin B is derived by proteolytic amino acid precursor,prepro-orexin, which is encoded by a gene localized to chromosome17q21 in humans. In radioligand binding studies, Orexin B has ahigher affinity for the OX2 receptor. Human Orexin B has two aminoacid substitutions when compared with the rodent sequence. OX2receptor is indeed a high-affinity receptor for human orexin B,with an IC 50 of 36 nM in the binding assay and an EC 50 of 60 nMin the [Ca 2+ ]i transient assay. Human Orexin B has significantlylower affinity for the human OX1: the calculated IC 50 in thecompetitive binding assay and the EC 50 in the [Ca 2+ ]i transientassay are 420 nM and 2500 nM for human orexin-B, respectively. |
| 体内研究 | Human Orexin B significantly augments food intake; at the 2 hr timepoint, 5- and 12-fold stimulation of food consumption is observedby 3 nM and 30 nM orexin-B, respectively. |
