biological molecules: proteins
- Created by: Rosie Young
- Created on: 14-02-13 16:03
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- Biological molecules: proteins
- quaternary structure
- some proteins are made up of more than one polypeptide subunits
- haemoglobin
- haemoglobin
- haem group contains Fe2+
- prosthetic group
- 4 polypeptide subunits
- 2 alpha
- 2 beta
- oxygen binds to iron
- globular
- haem group contains Fe2+
- tertiary structure
- 3D structure of the final polypeptide molecule
- collagen
- fibrous
- forms cross-links (covalent bonds) with other collagen molecules
- collagen fibrils for a collagen fibre
- function
- strength in the walls of blood vessels
- tends connect skeletal muscle to the bone
- bones
- cosmetic purposes
- cartilage
- secondary structure
- coiling and pleating of the polypeptide molecule
- held in place by hydrogen bonds
- coiling and pleating of the polypeptide molecule
- DNA determines the order the amino acids are bonded in
- quaternary structure
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