Proteins 1
- Created by: Jasmin
- Created on: 13-01-14 20:05
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- Proteins
- Monomers of proteins are amino acids
- Dipeptide is formed when 2 AA join together
- Polypeptide is formed when more than 2 AA join together
- Proteins are made up of one or more polypeptides
- Structure of an AA
- Basic monomer units which combine to make up a polymer called a polypeptide
- Each AA has a central C atom to which the following are attached
- Amino group NH2
- Carboxyl group COOH an acidic group which gives the AA the acid part of the name
- Hydrogen atom H
- R group - a variety of different chemical groups. Each AA has a different R group
- Formation of a peptide bond
- Condensation reactions - removal of water molecule
- Water is made by combining an OH- from the carboxyl group of one AA with an H from the amino group of another AA
- 2 C atoms become linked by a new peptide bond between the C atom of one AA and the N atom of the other
- Peptide bond of a dipeptide can be broken by hydrolysis (addition of water) to give it 2 constituent AAs
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