Figure 5From: Molecular basis for the distinct divalent cation requirement in the uridylylation of the signal transduction proteins GlnJ and GlnB from Rhodospirillum rubrumCD spectra for GlnJ (A) and GlnB (B); protein only (dashed), protein + MnATP (solid) and protein + MgATP (dotted). Proteins were at 100 μM trimer concentration, ATP at 10 mM and MgCl2/MnCl2 at 10 mM. Spectra were recorded at 24°C.Back to article page