TRP 2 * TYR 4 * TRP 13 * PHE 17 * SER 26 * PRO 27 * ASN 59 * HIS 61 * ALA 62 * PHE 63 * ASN 64 * ILE 88 * GLN 89 * PHE 90 * HIS 91 * PHE 92 * HIS 93 * GLU 103 * HIS 104 * GLU 114 * LEU 115 * HIS 116 * LEU 117 * VAL 118 * HIS 119 * TRP 120 * PHE 127 * GLY 128 * VAL 131 * LEU 137 * ALA 138 * VAL 139 * LEU 140 * GLY 141 * TYR 190 * GLY 192 * SER 193 * LEU 194 * THR 195 * THR 196 * PRO 197 * PRO 198 * LEU 199 * LEU 200 * CYS 202 * VAL 203 * TRP 205 * ASN 240 * TRP 241 * ARG 242 *