Fig 6. Production of ¹³C-labeled Trp, ILA, TOL and IAA when C. tropicalis was cultured continuously with ¹³C₁₁-Trp-RPMI 1640 medium.

After the 8 h pre-incubation period (0 h), the culture medium was changed to a fresh ¹³C₁₁-Trp-RPMI 1640 and the culture was continued another 16 or 24 h. The results are the means from triplicate experiments and error bars indicate the means ± standard deviations.