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Levels of vitamin B6 vitamers in Arabidopsis pdx3 and sos4 mutant plants and Arabidopsis ecotype Col-0 (WT) determined by HPLC analysis. Values represent the average concentration in plant extracts obtained from two independent sets of plants. Means followed by the same letter are not significantly different at P = 0.05 according to the Waller-Duncan k-ratio t test.
