Figure 1From: Molecular basis for the distinct divalent cation requirement in the uridylylation of the signal transduction proteins GlnJ and GlnB from Rhodospirillum rubrumAlignment of the amino acid sequence of the R. rubrum GlnB and GlnJ proteins, constructed using ClustalW (http://www.ebi.ac.uk/Tools/clustalw2/index.html). The loop regions are highlighted and the positions of the amino acid substitutions used in this study are marked with a star.Back to article page