Orexin B (human) peptide

Orexin B (human) peptide

• COA/MS/HPLC Report
• Handling and Storage of Synthetic Peptides
• Material Safety Data Sheets (MSDS)

Batch to batch variation of the purity

RSGPPGLQGRLQRLLQASGNHAAGILTM-NH2

H-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

28

95.22%

C₁₂₃H₂₁₂N₄₄O₃₅S

2899.33

205640-91-1

Synthetic

Powder

Like orexin A, orexin B is a hypothalamic neuropeptide regulating the feeding behavior. Central administration of this peptide to rats stimulated food consumption in a similar manner to orexin A, but the effect did not last as long as that of orexin A. The affinity of orexin B for the OX1 receptor is significantly lower (IC50 = 240 nM) than that of orexin A. Binding affinities for the OX2 receptor are similar for orexin A and B (IC50

Normally, this peptide will be delivered in lyophilized form and should be stored in a freezer at or below -20 °C. For more details, please refer to the manual: Handling and Storage of Synthetic Peptides

• M.W.Schwartz, Nat. Med., 4, 385 (1998)
• T.Sakurai et al., Cell, 92, 573 (1998)
• M.R.Jain et al., Regul. Peptides, 87, 19 (2000)

Trifluoroacetic acid (TFA) is a common counterion from the purification process using High-Performance Liquid Chromatography (HPLC). The presence of TFA can affect the peptide's net weight, appearance, and solubility.

Impact on Net Weight: The TFA salt contributes to the total mass of the product. In most cases, the peptide content constitutes >80% of the total weight, with TFA accounting for the remainder.

Solubility: TFA salts generally enhance the solubility of peptides in aqueous solutions.

In Biological Assays: For most standard in vitro assays, the residual TFA levels do not cause interference. However, for highly sensitive cellular or biochemical studies, please be aware of its presence.