PRO 20 * LEU 21 * GLN 22 * VAL 23 * ILE 24 * GLU 25 * ALA 26 * ARG 38 * THR 39 * VAL 40 * ALA 41 * VAL 42 * LYS 43 * MET 44 * ALA 56 * LEU 57 * SER 59 * GLU 60 * LEU 61 * LYS 62 * ILE 63 * LEU 64 * ILE 65 * ILE 67 * GLY 68 * HIS 70 * ASN 72 * VAL 73 * VAL 74 * ASN 75 * LEU 76 * LEU 77 * GLY 78 * ALA 79 * LEU 87 * MET 88 * VAL 89 * ILE 90 * THR 91 * GLU 92 * PHE 93 * CYS 94 * LYS 95 * PHE 96 * GLY 97 * ASN 98 * LEU 99 * GLY 140 * MET 141 * PHE 143 * LEU 144 * CYS 149 * ILE 150 * HIS 151 * ARG 152 * ASP 153 * LEU 154 * ARG 157 * ASN 158 * ILE 159 * LEU 160 * LEU 161 * SER 162 * GLU 163 * LYS 168 * ILE 169 * CYS 170 * ASP 171 * PHE 172 *