RKIV24 ILFV42 DE49 P111 G113 IVL118 LIFV134 GR137 ND138 IVLA141 IVLA190 G194 GA217 VILA223 AVTGS232 CVIAL247 ASTG249 VILA255 ED298 IVLA316 TSA332 FVLIY341 ND353 G381 # found 24 key residues