HIS 4 * ALA 5 * GLY 6 * TYR 7 * TRP 16 * PHE 20 * LEU 60 * ASN 61 * ASN 62 * GLY 63 * TRP 64 * ALA 65 * PHE 66 * ASN 67 * GLU 69 * GLN 92 * HIS 94 * PHE 95 * HIS 96 * GLU 106 * VAL 121 * PHE 131 * LYS 170 * LEU 198 * THR 199 * THR 200 * PRO 201 * PRO 202 * LEU 203 * ASN 244 * ZN 522 *