GS29 LVIA103 ND113 GAS115 IVLAM117 R119 LIFVY200 VLIM201 LFIMV202 G203 E205 G208 LIVM209 ILV223 PDKAS224 STA236 LMIF237 NDS238 VLAI239 AST242 IVLA245 RKQ252 # found 22 key residues