Medical Definition of Petite mutant

1. A class of yeast mutants, most studied in Saccharomyces cerevisiae. Mutants grow slowly and rely on anaerobic respiration: mitochondria, although present, have reduced cristae and are functionally defective (termed promitochondria). There are three types of petite mutant: (i) Segregational mutants that show Mendelian behaviour and result from mutations in mitochondrial genes located in the nucleus. (ii) Neutral petites, which are recessive genotypes and result from the complete absence of mitochondrial DNA. (iii) Suppressive petites, in which most of the mitchondrial DNA is lost (60-99%), though what remains is often amplified. (06 Oct 1997)

Lexicographical Neighbors of Petite Mutant

petit bourgeois
petit dejeuner
petit four
petit juries
petit juror
petit jury
petit larceny
petit mal
petit mal epilepsy
petit mal seizure
petit point
petit pois
petite
petite bourgeoisie
petite marmite
petite mutant (current term)
petitely
petiteness
petitenesses
petites
petitgrain
petitio
petitio principii
petition
petitionarily
petitionary
petitioned
petitionee
petitionees
petitioner

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