2.7.1.143 0.04 - mizoribine - 697882 2.7.1.143 0.08 - ribavirin - 697882 2.7.1.143 0.24 - guanosine - 697882 2.7.1.143 0.28 - uridine - 697882 2.7.1.143 0.84 - 2-deoxy-adenosine - 697882 2.7.1.143 6.05 - adenosine - 697882 2.7.1.143 16 - ATP - 697882 2.7.1.143 80 - Inosine inosine is the most effective phosphoryl acceptor, with the highest kcat /Km value being achieved when ATP served as the phosphoryl donor 697882