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. 2013 Sep 16;8(9):e73923. doi: 10.1371/journal.pone.0073923

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© 2013 Biswas et al

This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are properly credited.

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(a) Tryptophan quenching of VcCheY3 and its different mutants (indicated at top of the figure) using acetyl phosphate (acP) as substrate. (b) Plot of ΔI/I₀ vs acP concentration (in mM) and corresponding K_m values (both in graphical and numerical modes); (c) Tryptophan quenching of VcCheY3 and its different mutants (indicated at top of the figure) using BeF₃ ⁻ as substrate.