The most common form of fibrillar collagen. It is a major constituent of bone (BONE AND BONES) and SKIN and consists of a heterotrimer of two alpha1(I) and one alpha2(I) chains. (mesh:D024042)
| Synonym | Reference | Specificity |
| Type I collagen | Exact | |
| collagen type I | Exact | |
| type I collagen | Exact |
| Identifier | Name | Relation |
| HGNC:2198 | COL1A2 | isa |
| HGNC:2197 | COL1A1 | isa |
| Relation | Identifier | Name |
| isa | FPLX:Collagen | None |