Fig. 1From: In vitro biosynthesis of ATP from adenosine and polyphosphateDesigned pathway of the in vitro synthetic enzymatic biosystem for the production of ATP. The Pi for providing phosphate group is from polyP6. Three enzymes are used in system. Among them, adenosine kinase catalyzes the reaction of adenosine and ATP to generate AMP and ADP, PPK2-I catalyzes ADP and polyPn to generate ATP and polyP(n-1), PPK2-III catalyzes AMP to generate ADP and then from ADP to generate ATPBack to article page