inosine kinase activity ATP:inosine 5'-phosphotransferase activity inosine kinase (phosphorylating) GO:0008906 molecular_function RHEA:21140 MetaCyc:INOSINEKIN-RXN inosine-guanosine kinase activity Catalysis of the reaction: ATP + inosine = ADP + IMP. kinase activity phosphotransferase activity, alcohol group as acceptor