positive Darwinian selection
Oxford Dictionary of Biochemistry:
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positive Darwinian selection
the relatively rare phenomenon whereby selective pressure favours change. A commonly used statistical test for positive Darwinian selection is comparison of the rate of synonymous with nonsynonymous substitutions: where nonsynonymous substitutions occur more frequently than synonymous substitutions, this is evidence that natural selection has favoured amino acid change.
| positive, positional isomer, positional information | |
| positive chromatography, positive control, positive cooperativity |
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Oxford Dictionary of Biochemistry
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