Table 1.
Molecular chain compositions of human fibrillar and FACIT collagens.
| Classes | Type | Molecular composition | Remarks |
|---|---|---|---|
| Fibrillar collagen | I | [1α(I)]2α2(I) | Fibrils composed of uninterrupted triple helical domains that are primarily found in skin, bone, tendons and ligaments, cartilage, cornea |
| II | [α1(II)]3 | ||
| III | [α1(III)]3 | ||
| V | [α1(V)]2, α2(V); [α1(V)]3; α1(XI)α2(V)α3(XI) | ||
| XI | α1(XI)α2(XI)α3(XI) | ||
| XXIV | [α1(XXIV)]3 | ||
| XXVII | [α1(XXVII)]3 | ||
| FACIT collagen | IX | [α1(IX), α2(IX), α3(IX)] | Fibril-associated collagens with interrupted triple helices: forming molecular bridges to the surface of collagen fibrils (e.g., IX, XII, XIV, XVI, XIX, XX, XXI) |
| XII | [α1(XII)]3 | ||
| XIV | [α1(XIV)]3 | ||
| XVI | [α1(XVI)]3 | ||
| XIX | [α1(XIX)]3 | ||
| XX | [α1(XX)]3 | ||
| XXI | [α1(XXI)]3 | ||
| XXII | [α1(XXII)]3 |