ILVF7 WFYE37 YF123 VIL124 YFHT125 LFIMV133 G135 RK142 ILV145 FYL148 YFHCG152 WKV175 EDS190 FYIL220 IVLAC233 EDAK236 G244 ILVA249 YFLWH263 IVATL264 ND265 DGNE269 LMIFVA270 LIVF275 K279 Y282 P284 # found 27 key residues