A-Level Biology OCR A
Structure Long Form End Tropocollagen Describe Collagen Polypeptides
Front |
Describe structure of collagen. |
Back |
Collagen structure:- Three polypeptides wound together in long rope-like triple helix structure
- Every third amino acid is glycine that allows close packing
- Hydrogen bonds between pp chains form long quaternary proteins with staggered ends - allow them to join end to end to form long tropocollagen fibrils
- Tropocollagen cross link to produce strong fibres
- High proportion of proline and hydroxyproline that repel each other giving stability
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A-Level Biology OCR A