Substrate and inhibitory properties of modified monophosphoric nucleoside d
erivatives toward adenylate kinase from human placenta were studied. Some H
-phosphonates and fluorophosphates demonstrated inhibitory properties, deox
ycompounds being considerably different from analogous ribo- and dideoxyrib
ocompounds. 3'-Azido-3'-deoxythymidine and its phosphorus-containing deriva
tives showed neither substrate nor inhibitory properties.