Coursework.Info - Inspiration in an Instant

On the left is an image preview of every page of this document, and below are the first 150 words with formatting removed:

Proteins All proteins are made up of amino acid subunits which are specific to the particular protein in question. There about 20 different amino acids, they all have a similar chemical structure but behave in very different ways because they have different R groups. Therefore, binding them together in different combinations will produce a wide variety of proteins with different characteristics and different jobs. Each amino acid has an amino group (NH2) and a carboxylic acid group (COOH). The R group is a variable group for all the different types' amino acid. These can make them neutral, acidic, alkaline, aromatic (has a ring structure) or have a sulphur-containing. When 2 amino acids are joined together (in a condensation reaction) the amino group from one and the acid group from another form a bond, producing one molecule of water. The bond formed is called a peptide bond. There are four different structures that proteins...

To see the full version of this document, and 145,348 others