Substance P, Free Acid TFA is a native substance P analog, but shows no biological activity of substance P [1].
References:
[1]. Patel AB, et al. Substance P (free acid) adopts different conformation than native peptide in DMSO, water and DPPC bilayers. J Biomol Struct Dyn. 2001 Aug;19(1):129-38.
References:
[1]. Patel AB, et al. Substance P (free acid) adopts different conformation than native peptide in DMSO, water and DPPC bilayers. J Biomol Struct Dyn. 2001 Aug;19(1):129-38.