Fig. 3From: Molecular characterization of equine thymidine kinase 1 and preliminary evaluation of its suitability as a serum biomarker for equine lymphomaSteady-state kinetic analysis of horse TK1. Plots of initial velocity versus substrate concentration, dThd A, dUrd B, Urd C and dGuo D. The ATP concentration was kept at 1 mMBack to article page