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. 2016 May 26;11(5):e0156392. doi: 10.1371/journal.pone.0156392

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Fig 2 — Table: K_m values at different pH for the main substrates α-D-Lactose, L-Fucose and D-Xylose of LacY, FucP and XylE, respectively determined from a hyperbolic fit to the peak currents as shown in Fig 1. ¹Data from [31]. Graph: pH dependence of K_m for XylE. The line is a fit to the data using a model function for sequential H⁺—sugar binding as indicated in the figure.