Abstract
The following subjects are reviewed: N metabolism; amino acid penetration; pyridoxal phosphate, decarboxylation, and transamination; dehydrogenases; oxidases; regulation; urea formation; alanine, aspartic acid, and glutamic acid; glycine and serine; threonine; lysine histidine; proline; sulfur amino acids; phenylalanine and tyrosine; tryptophan.