TAC1 GI:4507341 tachykinin 1 isoform beta precursor 1 mkilvalavf flvstqlfae eiganddlny wsdwydsdqi keelpepfeh 50 51 llqriarrpk pqqffglmgk rdadssiekq vallkalygh gqishkrhkt 100 101 dsfvglmgkr alnsvayers amqnyerrr