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. 2011 Aug 22;6(8):e23513. doi: 10.1371/journal.pone.0023513

Figure 5. Coupled cis-trans isomerization/proton transfer model.

Figure 5

A. Model for pH-dependent, reversible color-switching of GmKate. The chemical structures were drawn in ChemDraw. B. Putative proton relay pathways in mKateS158A. Three hydrogen bond networks are shown based on the crystal structure of mKateS158A.