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. 2015 Aug 28;10(8):e0136692. doi: 10.1371/journal.pone.0136692

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© 2015 Kaur 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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Fig 5 — Effect of Cu²⁺ on PPIase activity of AtCyp19-3 and TaCypA-1. First order rate constants were analysed using GraFit 4.0 software. The residual PPIase activity (%) is relative to uninhibited control. (B) Inhibition constants (k_i) of Cu²⁺ for AtCyp19-3 and TaCypA-1 were determined as gradient of the line of the best fit from a plot of [Cu²⁺]/(1-k/k_o) against k_o/k, where k is the rate constant at any given Cu²⁺ concentration and k_o is the rate constant in the absence of heavy metal. The slope of the line represents the ki. Data represent the mean ± SD of triplicates.