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Neurokinin A (4-10) TFA is a tachykinin NK₂ receptor agonist.

Neurokinin A (NKA) and its truncated form NKA(4-10) are potent spasmogens of human colon circular muscle, an action mediated exclusively via tachykinin NK₂ receptors. A structure-activity study of the neurokinin A (NKA) fragment NKA(4-10) is performed to investigate the importance of amino acid residues for receptor efficacy, potency and affinity at the NK₂ receptor in human colon circular muscle. A high density of NK₂ receptors has been demonstrated in this tissue, using in vitro autoradiography and radioligand binding.

Room temperature in continental US; may vary elsewhere.

Sealed storage, away from moisture

*In solvent : -80°C, 6 months; -20°C, 1 month (sealed storage, away from moisture)