Growth of wild-type (♢), mxaF (□), xoxF1 (△), xoxF2 (×), xoxF1 xoxF2 (+), and mxaF xoxF1 xoxF2 (○) strains in MP methanol medium containing 20 μM Ca (A), 20 μM La (B), or both 20 μM Ca and 2 μM La (C). The graphs show representative data obtained from three biological replicates. Variation in growth rates for all replicates was within 2%.