title: Mapping of the aspartate and aromatic amino acid aminotransferase genes tyrB and aspC.
abstract: Co-transduction experiments using P1-mediated reciprocal and three-factor crosses have been used to map two mutations affecting the aspartate and aromatic amino acid aminotransferases of Escherichia coli. tyrB-, which inactivates the tyrosine-repressible component of these activities is co-transducible with metA and malB; the gene order is metA-malB-tyrB. aspC-, which inactivates the nonrepressible aminotransferase with high activity for aspartate, maps between and is co-transducible with serC and pyrD.
mesh_terms: D001219:Aspartate Aminotransferases / Q000096:biosynthesis*; D002874:Chromosome Mapping; D002876:Chromosomes, Bacterial; D004926:Escherichia coli / Q000201:enzymology*; D005796:Genes; D011995:Recombination, Genetic; D000637:Transaminases / Q000096:biosynthesis*; D014161:Transduction, Genetic
chemical_list: D000637:Transaminases; D001219:Aspartate Aminotransferases