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Assays of folate biosynthesis enzyme activities in high and low folate pak choi (Brassica rapa subsp. Chinensis) accessions/cultivars grown under controlled conditions. (A) GCHI activity assay. (B) ADCS activity assay. Each value is the average of three analyses from three independent replicates ±SD. Different letters at the top of bars within the same group indicate a significant difference at P<0.05 by Duncan’s multiple-range test.
