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Hemokinin 1 (mouse) is a selective agonist of neurokinin-1 receptor, with Ki of 0.175 nM and 560 nM for human NK1 receptor and human NK2 receptor, respectively.
Neurokinin A TFA (Substance K TFA), a peptide neurotransmitter of the tachykinin family, acts via the NK-2 receptor. Neurokinin A acts as a major mediator in human airway and gastrointestinal tissues.
Biotin-Substance P is the biotin tagged Substance P. Substance P (Neurokinin P) is a neuropeptide, acting as a neurotransmitter and as a neuromodulator in the CNS. The endogenous receptor for substance P is neurokinin 1 receptor (NK1-receptor, NK1R).
GR 64349 is a potent and highly selective NK2 receptor peptide antagonist, with an EC50 of 3.7 nM in rat colon. GR 64349 exhibits selectivity >1000 and >300-fold with respect to NK1 and NK3 receptors, respectively.
GR 94800 TFA is a potent and selective NK2 receptor peptide antagonist, with pKB values of 9.6, 6.4 and 6.0 for NK2, NK1 and NK3 receptors, respectively.