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Growth phenotypes of the wild-type and ΔhpdA mutant (HPPD15 and HPPD21) strains. Strains GR5 (wild type), HPPD15, and HPPD21 were grown for 72 h at 37°C in YUU, (YAG supplemented with 1.2 g/liter each of uracil and uridine), MM, MC plus lactose (L), MC plus lactose plus phenylalanine (L+P), or MC plus phenylalanine (P). All media except YUU were supplemented with pyridoxin.
