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Comparison of MT1 and MT2 activities in AtPMT2 site-directed mutants. Activity of the AtPMT2 Y131A, Y131F, Y246A, and Y246F relative to wild-type enzyme is shown for either pEA (gold) or pDME (blue) as phosphobase substrate. All assays were performed using standard reaction conditions with values shown as the mean ± S.D. for n = 3.
