| Unit 1 | ARG171 SER172 ASN173 LEU174 GLY175 TRP176 LEU177 SER178 LEU179 LEU180 LEU181 LEU182 PRO183 ILE184 PRO185 LEU186 ILE187 VAL188 TRP189 VAL190 LYS191 ARG192 LYS193 GLU194 VAL195 GLN196 LYS197 THR198 |
| Unit 2 | ARG171 SER172 ASN173 LEU174 GLY175 TRP176 LEU177 SER178 LEU179 LEU180 LEU181 LEU182 PRO183 ILE184 PRO185 LEU186 ILE187 VAL188 TRP189 VAL190 LYS191 ARG192 LYS193 GLU194 VAL195 GLN196 LYS197 THR198 |
| Unit 3 | ARG171 SER172 ASN173 LEU174 GLY175 TRP176 LEU177 SER178 LEU179 LEU180 LEU181 LEU182 PRO183 ILE184 PRO185 LEU186 ILE187 VAL188 TRP189 VAL190 LYS191 ARG192 LYS193 GLU194 VAL195 GLN196 LYS197 THR198 |