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A novel cytochrome P450 3A isoenzyme in rat intestinal microsomes

  • Ghennady V. Gushchin
  • , Marina I. Gushchin
  • , Nicholas Gerber
  • , R. Thomas Boyd

Research output: Contribution to journalArticlepeer-review

Abstract

PCR with several pairs of primers facilitates screening for new isoenzymes among highly homologous cytochrome P450s (CYPs). Combinations of two pairs of primers, which amplify N- and C-terminal coding sequences of either CYP3A1/CYP3A23 or CYP3A2 detected the presence of a previously unrecognized CYP3A in enterocyte microsomes isolated from rats. PCR, Northern blot, and immunoblotting with specific antibodies indicated that this isoenzyme is clearly distinguishable from CYP3A1, 3A23 or 3A2. Sequencing of a 285 bp coding fragment of this gene revealed 97% similarity with rat olfactory CYP3A9 (P450olf3).

Original languageEnglish
Pages (from-to)394-398
Number of pages5
JournalBiochemical and Biophysical Research Communications
Volume255
Issue number2
DOIs
StatePublished - Feb 16 1999

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