Fig. 3

Annealing temperature optimization comparison between DPO primers and conventional primers. Lanes 1–6 represent 40 °C, 44 °C, 48 °C, 52 °C, 56 °C, 60 °C, for a gradient with 6 temperatures; Lane 7 represents negative template (N). a DPO primer annealing temperature optimization test; b Normal annealing temperature optimization test for primers