In this Article, the LIV-BP sensors used were site-specifically labelled with self-healing LD555P and LD655 organic fluorophores, not LD550 and LD650 as indicated. Also, we site-specifically labelled LIV-BP mutant D181C, not E181C. The sentence “The rate of single-turnover transport decreased by nearly an order of magnitude when the external pH was increased from 6 to 8 (Fig. 3c)” should read “The rate of single-turnover transport decreased by nearly an order of magnitude when the external pH was decreased from 8 to 6 (Fig. 3c)”. These errors have no effect on the results presented or the interpretations and conclusions made. These errors have been corrected online.