YqeH Activity in Presence of Different Monovalent Cations.

Specific activity is represented as the amount of Pi released for a given concentration of enzyme for a certain time (min). Experiments were conducted in duplicates and were reproduced at least twice. The errors represent the standard deviation from the average. Absorbance was corrected for the background intrinsic GTP hydrolysis and the background GTP hydrolysis (represented as amount of Pi released to the amount of GTP added, per min) is indicated in brackets. ** indicates that the activity could not be measured.