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Proteins are extremely important and are around 50% of the dry mass of most cells in the body.
Member rating: No Rating | Words: | Submitted: Thu Aug 21 2003
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Proteins Proteins are extremely important and are around 50% of the dry mass of most cells in the body. The main uses of proteins are: * Essential component of a cell membranes. * Haemoglobin used to transport oxygen is made up of protein * Antibodies are made of proteins * Most enzymes are made of proteins * Hair and surface layers of the skin contain proteins (keratin) * Collagen another protein used to strengthen bones and artery walls. When proteins are broken down they form amino acids, these then produce many different chemicals. There is a set structure for these chemicals. It revolves around carbon, one side has an amine group (-NH2) and on the other a carboxylic acid group (-COOH) then there is a final hydrogen (H) bonded to the bottom of the carbon. There is a final group which sits at the top but varies between each amino acid (R). There are 20 different...
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