1-13-Dynorphin A (swine) 72957-38-1 Dinorphin A (1-13) Dynorphin 1-13 Dynorphin A (1-13) L-Lysine, L-tyrosylglycylglycyl-L-phenylalanyl-L-leucyl-L-arginyl-L-arginyl-L-isoleucyl-L-arginyl-L-prolyl-L-lysyl-L-leucyl- dynorphin (1-13)