LEU 56 * CYS 57 * GLY 58 * ALA 70 * ALA 71 * HIS 72 * CYS 73 * LEU 74 * LEU 75 * TYR 76 * PRO 77 * PRO 78 * TRP 79 * ASP 80 * LYS 81 * TYR 119 * ASN 120 * TRP 121 * ARG 122 * GLU 123 * ASN 124 * LEU 125 * ASP 126 * ASP 128 * GLY 171 * ASN 172 * GLU 175 * THR 198 * ARG 199 * ILE 200 * ARG 201 * ILE 202 * MET 206 * ASP 220 * ALA 221 * CYS 222 * GLU 223 * GLY 224 * ASP 225 * SER 226 * GLY 227 * ILE 245 * VAL 246 * SER 247 * TRP 248 * GLY 249 * GLU 250 * GLY 251 * CYS 252 * ASP 253 * ARG 254 * LYS 257 * TYR 258 * GLY 259 * PHE 260 * THR 262 *