TAC4 GI:117938264 tachykinin 4 isoform alpha-2 1 mlpclallll melsvctvag dggeeqtlst eaetwegagp siqlqlqevk 50 51 tgkasqffgl mgkrvggrpl iqprrkkayq lehtfqgllg krslftegre 100 101 deaqgse