| Fibril-forming collagens |
Long triple-helical domains for fibril formation |
I, II, III, V, XI, XXIV, XXVII |
| Fibril-associated collagens with interrupted triple helices (FACITs) |
Do not form fibrils, but associate with fibril surfaces |
IX, XII, XIV, XVI, XIX, XX, XXI, XXII |
| Network-forming collagens |
Form repeating patterns |
IV, VIII, X |
| Membrane collagens |
Span the cell membrane |
XIII, XXIII, XXV |
| Multiplexins |
Have many non-collagenous domains, but are not FACITs |
XV, XVIII |
| Others |
Do not belong to any of the above categories |
VI, VII, XXVIII |
