2.7.1.76 in complex with deoxyadenosine 5'-triphosphate and 2'-deoxycytidine 5'-triphosphate, as well as with products 2'-deoxycytidine 5'-phosphate and 2'-deoxycytidine 5'-diphosphate. Both deoxyadenosine 5'-triphosphate and 2'-deoxycytidine 5'-triphosphate bind to the enzyme in a feedback-inhibitory manner with the deoxyribonucleoside part in the deoxyribonucleoside binding site and the triphosphates in the P-loop. Superposition with human counterparts deoxyguanosine kinase and deoxycytidine kinase. Overall structures are very similar with a few amino acid alterations in the proximity of the active site 2.7.1.76 sitting drop vapour diffusion method using 24% (w/v) PEG 3350 and 0.2 M KSCN 2.7.1.76 three-dimensional structural model based on crystal structure of Mycoplasma mycoides deoxyadenosine kinase