Dithiothreitol; potassium chloride; adenosine 5'-triphosphoric acid; magnesium chloride; deoxycytidine kinase; BSA in water T=37°C; pH=7.6; 0.75 h; Tris bufferEnzymatic reaction;

phosphoric acid trimethyl ester; trichlorophosphate T=-5°C; 2 h;