| QRDR | quinolone resistance determining region |
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| quinolones | Quinolines which are substituted in any position by one or more oxo groups. These compounds can have any degree of hydrogenation, any substituents, and fused ring systems. (12 Dec 1998) |
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| anti-infective agents, quinolone | A group of synthetic antimicrobial agents which usually contain a 4-quinolinone ring structure. A few compounds belonging to this group have related nitrogen heterocyclic ring structures such as naphthyridine or phthalazine groups. All compounds in this group are substituted with an oxo group at the 4-position. The second-generation quinolones are also substituted with a 1-piperazinyl group at the 7-position and a fluorine moiety at the 6-position. The quinolones inhibit the a subunit of DNA gyrase and thus interfere with the ability of the enzyme to repair bacterial DNA breaks during replication. The compounds have a broad spectrum of activity against a variety of aerobic bacteria. (12 Dec 1998) |
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Synonyms :
| quinolone |
any of a group of synthetic antibacterial agents that includes nalidixic acid, cinoxacin, rosoxacin, and the fluoroquinolones (fluorinated 4-q's).
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