| C1r (Complement component 1r) | 80.119 | UniProtKB |
| C1s (Complement component 1s) | 76.684 | UniProtKB |
| C1s inactivator | 104 | 601508 |
| C2 (Complement component 2) | 83.268 | UniProtKB |
| C3 (Complement component 3) | 187.148 | UniProtKB |
| C3 PA (properdin factor B) | 80 | Found via general search |
| C3a (Complement component 3a) | 10 | Found via general search |
| C3c (Complement component 3c) | 137 | Found via general search |
| C3d (Complement component 3d) | 33.8 | Found via general search |
| C4 (Complement component 4) | 230 | 601508 |
