Selective, competitive and reversible G-protein antagonist. Inhibits the activation of Gi or Go by M2 muscarinic cholinergic receptors (mAChR) and Gs by β-adrenergic receptors in reconstituted phospholipid vesicles. Inhibition is reversible and competitive with respect to receptor binding to G proteins. Substance P (Prod. No. ALX-167-003) related compound. Product Specification Alternative Name:G-protein antagonist 2 Sequence:H-Pyr-Gln-D-Trp-Phe-D-Trp-D-Trp-Met-NH2 Formula:C57H64N12O9S MW:1093.3 Formulation:Lyophilized. Purity:≥95% (HPLC) Solubility:Soluble in water or DMSO. Long Term Storage:-20°C