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Comparison of total vitamin B6 in Arabidopsis pdx3 and sos4 mutant lines and Arabidopsis ecotype Col-0 (WT) determined by yeast bioassay and HPLC analysis. HPLC values represent the sum of PMP, PM, PLP, PL, PNP, and PN. Total vitamin B6 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.
