A-Level Biology OCR A
Structure Bonds R Groups Tertiary Polypeptide Amino Acids Define
| Front |
Define tertiary structure and describe how it is held in place (all possible bonds). |
| Back |
Tertiary structure - final 3D structure of the polypeptide- Coiling of polypeptide into secondary structure brings R-groups of diff amino acids closer together - can interact causing further folding
Bonds involved (order of strength): - Disulfidfe bonds - covalent bond between two sulfur containing amino acids
- Ionic bonds - between a basic and an acidic R-group
- Hydrophobic interactions - between non-polar R-groups (in aqueous env. they will be on the inside and hydrophilic on the outside)
- Hydrogen bonds - between polar/hydrophilic R-groups
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A-Level Biology OCR A