| Type | Chains | Genes | Chromosome | Procollagen | Tissues | Disease |
|---|---|---|---|---|---|---|
| I |  1(I) 2(I) | COL1A1 COL1A2 | 17 7 | [ 1(I)]2 2(I) | bone, skin, tendon | Osteogenesis Imperfecta |
| II | 1(II) | COL2A1 | 12 | [ 1(II)]3 | cartilage | Chondrodysplasia |
| III | 1(III) | COL3A1 | 2 | [ 1(III)]3 | skin, arteries, uterus, intestine | Ehlers-Danlos Syndrome |