SNAT61 GA63 DEQT65 VAI68 LIVTMF70 LMIV72 IFLVA162 G164 RK166 QDE169 P193 LIV194 WF197 VIL202 WYFEK203 YF205 ILMVA206 PKED212 LMI216 YHFL217 YF221 SRTP223 ILV224 GV225 TS230 # found 25 key residues