title: Close linkage of the cytochrome P450IIA gene subfamily (Cyp2a) to Cyp2b and Coh on mouse chromosome 7.
abstract: The cytochrome P450IIB gene subfamily (Cyp2b) has previously been mapped close to the Coh locus encoding a cytochrome P450 with coumarin 7-hydroxylase (COH) activity on mouse chromosome 7. Given this observation, it had been considered that COH was a member of the P450IIB subfamily. However, recent biochemical and cDNA expression experiments indicate that a member of the P450IIA subfamily, rather than of the P450IIB subfamily, encodes COH. We have resolved this apparent anomaly between the genetic and biochemical data by showing that genes from the P450IIA subfamily (Cyp2a) are closely linked to Coh and to Cyp2b on mouse chromosome 7.
authors.affiliation: Laboratory of Molecular Pharmacology, University Department of Biochemistry, Edinburgh, United Kingdom.
authors.forename: J S
authors.initials: JS
authors.lastname: Miles
authors.forename: J E
authors.initials: JE
authors.lastname: Moss
authors.forename: R R
authors.initials: RR
authors.lastname: Meehan
authors.forename: C R
authors.initials: CR
authors.lastname: Wolf
mesh_terms: D000818:Animals; D001189:Aryl Hydrocarbon Hydroxylases; D002875:Chromosomes; D065637:Cytochrome P-450 CYP2A6; D003577:Cytochrome P-450 Enzyme System / Q000235:genetics*; D008040:Genetic Linkage; D051379:Mice; D008810:Mice, Inbred C57BL; D008811:Mice, Inbred DBA; D006899:Mixed Function Oxygenases / Q000235:genetics* / Q000378:metabolism; D005810:Multigene Family; D012150:Polymorphism, Restriction Fragment Length
chemical_list: D003577:Cytochrome P-450 Enzyme System; D006899:Mixed Function Oxygenases; D001189:Aryl Hydrocarbon Hydroxylases; D065637:Cytochrome P-450 CYP2A6