this review focuses on utilization of amino acids as n- and c/n-sources , the pathways of purine and pyrimidine degradation , novel aspects of amino acid biosynthesis ( with emphasis on branched-chain amino acids and delta-aminolevulinic acid ) and some aspects of ammonia assimilation and glutamate synthesis by purple bacteria , green sulfur bacteria and chloroflexus aurantiacus .
C0002520
amino acids
C0002563
delta-aminolevulinic acid