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. 2011 Dec 20;287(7):4602–4608. doi: 10.1074/jbc.M111.312538

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© 2012 by The American Society for Biochemistry and Molecular Biology, Inc.

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FIGURE 4. — LFER between k_cat for UGM-catalyzed isomerization of UDP-Galf to UDP-Galp and electron-withdrawing effects due to para/meta substitution versus N5 of FAD_red. A, list of FAD analogues prepared for measuring the LFER. B, Hammett plot for the correlation of log₁₀(k_cat) versus the sum of σ_p and σ_m. The fit was obtained from unweighted least-squares linear regression, and error bars denote 1 S.E. of log₁₀(k_cat) above and below the observed value. OMe, methoxy; Cl, chloro; CF₃, trifluoromethyl.