Npa is an unnatural amino acid isosteric with tryptophan, but more lipophilic & resistant to oxidation
Also Known As:
substance P (4-11), Pro(4)-Npa(7,9)-Phe(11)-; 4-Pro-7,9-Npa-11-Phe-substance P (4-11); 4-prolyl-7,9-naphthylalanyl-11-phenylalanine-substance P (4-11); PNPSP; substance P (4-11), prolyl(4)-naphthylalanyl(7,9)-phenylalanine(11)-; L-Phenylalaninamide, D-prolyl-L-glutaminyl-L-glutaminyl-3-(1-naphthalenyl)-D-alanyl-L-phenylalanyl-3-(1-naphthalenyl)-D-alanyl-L-leucyl-, (3beta)-