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Expression from the mxa (A) and xox1 (B) promoters in the wild type grown in MP succinate-methanol medium containing 20 μM Ca without (control) and with 2 μM different lanthanides, with the exception of Sm (tested at 2 μM and 20 μM). The background expression level from the promoterless venus fusion vector was 58 ± 5 RFU/OD600. The data were obtained from three biological replicates, and the error bars show standard deviations from the means.
