Genes and enzymes.
D000818:Animals; D001435:Bacteriophages / Q000378:metabolism; D001671:Biochemistry / Q000266:history; D005075:Biological Evolution; D002875:Chromosomes / Q000378:metabolism; D004330:Drosophila / Q000201:enzymology; D004739:England; D004798:Enzymes / Q000096:biosynthesis; D004926:Escherichia coli / Q000201:enzymology; D005796:Genes; D005823:Genetics / Q000266:history; D006639:Histidine / Q000378:metabolism; D049673:History, 20th Century; D006801:Humans; D009491:Neurospora / Q000201:enzymology; D009876:Operon; D014176:Protein Biosynthesis; D012486:Salmonella typhimurium / Q000378:metabolism; D014158:Transcription, Genetic; D014481:United States
D004798:Enzymes; D006639:Histidine