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. 2016 Jun 16;7:862. doi: 10.3389/fpls.2016.00862

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Copyright © 2016 Ampah-Korsah, Anderberg, Engfors, Kirscht, Nordén, Kjellström, Kjellbom and Johanson.

This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) or licensor are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

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Boric acid permeability in proteoliposomes. Stopped-flow traces showing kinetics of boric acid transport in phosphorylated (A) and dephosphorylated (B) NbXIP1;1α protein reconstituted in E. coli lipid vesicles supplemented with 20% cholesterol. Control liposomes (red) and proteoliposomes (blue). (A) The traces (mean of eight traces) were fitted to double exponential equations. The rate constant and SEE values for the fitted curves were control (R₁ = 1.47 ± 0.03 s^–1; R₂ = 0.11 ± 0.01 s^–1) and NbXIP1;1α (R₁ = 1.62 ± 0.05 s^–1; R₂ = 0.20 ± 0.03 s^–1). (B) The rate constant and SEE values for the fitted curves after fitting the traces (mean of 15 and 29 traces for control liposomes and proteoliposomes, respectively) to double exponential equations were control (R₁ = 1.44 ± 0.07 s^–1; R₂ = 0.11 ± 0.04 s^–1) and NbXIP1;1α (R₁ = 1.02 ± 0.10 s^–1; R₂ = 0.26 ± 0.07 s^–1).