TRP 5 * GLY 6 * TYR 7 * GLY 8 * ASN 11 * GLY 12 * PRO 13 * TRP 16 * ASP 19 * PHE 20 * ASN 61 * ASN 62 * GLY 63 * ALA 64 * ALA 65 * PHE 66 * HIS 96 * LYS 170 * GLY 171 * THR 199 * THR 200 * PRO 201 * ASN 230 * PHE 231 * ASN 232 * GLU 239 * MET 241 * ASP 243 * ASN 244 * TRP 245 *