Functional analysis of drmct homologues in Xenopus oocytes. After the injection of 5 ng drmct s cRNA into Stage V-VI Xenopus oocytes for 2 days, the uptake experiment was initiated by transferring the oocytes to 28°C or 18°C for 6 h and then L-[14C]-lactate (5 kBq) was added into the incubation medium. Data are present as mean ± SD (n = 20). Different letters indicate significant differences between treatments (One-way ANOVA, Tukey’s pairwise comparisons). *, Significantly different between 28°C and 18°C (Student’s t-test, p < 0.05).