... before the start of the reaction. During the first 15 min of the reaction, four samples of 10 lL each,taken at various time points 3, 6, 9 and 12 min after the start of the reaction, were applied to ... efficiency of ATP-incubated hTK1 is approximately 30-fold higherthan that of non-incubated hTK1. The two TK1 formscan therefore be referred to as the high- and low-efficiency forms. To explain the ... hTK1.In the present work, the part of the phosphatedonor that is necessary for the dimer–tetramer transi-tion of native hTK1 purified from human lymphocyteswas identified. Further, the effect of the...