| mismatch repair | <molecular biology> A DNA repair system that detects and replaces wrongly paired, mismatched, bases in newly replicated DNA. E. Coli has a mismatch correction enzyme coded for by three genes mutH, mutL and mutS, that is directed to the newly synthesised strand and removes a segment of that strand including the incorrect nucleotide. The gap is then filled by DNA polymerase. (18 Nov 1997) |
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| ventilation/perfusion mismatch | An imbalance between alveolar ventilation and pulmonary capillary blood flow. (05 Mar 2000) |
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| v/q mismatch | <radiology> Mnemonic: FEV ONE, F fibrosing mediastinitis, E effusion, V vasculitis, O one pulmonary artery (or hypoplasia), N neoplasm, E embolism (12 Dec 1998) |