| Unit 1 | PRO21 ASP22 TRP23 ARG24 GLN25 PHE26 CYS27 GLU28 LEU29 HIS30 ALA31 GLN32 ALA33 ALA34 ALA35 VAL36 ASP37 PHE38 ALA39 HIS40 LYS41 PHE42 CYS43 ARG44 PHE45 LEU46 ARG47 ASP48 ASN49 PRO50 ALA51 TYR52 ASP53 THR54 PRO55 ASP56 ALA57 GLY58 ALA59 SER60 PHE61 SER62 ARG63 HIS64 PHE65 ALA66 ALA67 ASN68 PHE69 LEU70 ASP71 VAL72 PHE73 GLY74 GLU75 GLU76 VAL77 ARG78 ARG79 VAL80 LEU81 VAL82 ALA83 |
| Unit 2 | PRO21 ASP22 TRP23 ARG24 GLN25 PHE26 CYS27 GLU28 LEU29 HIS30 ALA31 GLN32 ALA33 ALA34 ALA35 VAL36 ASP37 PHE38 ALA39 HIS40 LYS41 PHE42 CYS43 ARG44 PHE45 LEU46 ARG47 ASP48 ASN49 PRO50 ALA51 TYR52 ASP53 THR54 PRO55 ASP56 ALA57 GLY58 ALA59 SER60 PHE61 SER62 ARG63 HIS64 PHE65 ALA66 ALA67 ASN68 PHE69 LEU70 ASP71 VAL72 PHE73 GLY74 GLU75 GLU76 VAL77 ARG78 ARG79 VAL80 LEU81 VAL82 |
| Unit 3 | MET20 PRO21 ASP22 TRP23 ARG24 GLN25 PHE26 CYS27 GLU28 LEU29 HIS30 ALA31 GLN32 ALA33 ALA34 ALA35 VAL36 ASP37 PHE38 ALA39 HIS40 LYS41 PHE42 CYS43 ARG44 PHE45 LEU46 ARG47 ASP48 ASN49 PRO50 ALA51 TYR52 ASP53 THR54 PRO55 ASP56 ALA57 GLY58 ALA59 SER60 PHE61 SER62 ARG63 HIS64 PHE65 ALA66 ALA67 ASN68 PHE69 LEU70 ASP71 VAL72 PHE73 GLY74 GLU75 GLU76 VAL77 ARG78 ARG79 VAL80 LEU81 VAL82 |