General metabolism of amino acids. Transamination. Deamination; essential and non-essential amino acids. Protein catabolism; nitrogen balance; the urea cycle- its biochemical importance and metabolic disorders. In- born errors of amino acid metabolism – alkaptonuria, phenylketonuria, Page 14 of 40 tyrosinemia, maple syrup urine disease, homocystinuria, albinism, cystinuria and non-ketotic hyperglycaemia. catabolism of carbon skeletons of amino acids; conversion of amino acids into specialized products. Ketogenicity and glucogenicity.