Figure 3.

Agarose gel stained with ethidium bromide showing the 148-bp amplified Y. pestis pla fragment obtained from ancient DNA after suicide PCR. Products resulting from DNA extracted from the dental pulp tissues collected from the ancient adult male skeleton (lanes 2 and 3), the ancient adult female skeleton (lanes 5 and 6) and negative control dental pulp tissues (lane 8) are shown. Lanes 1, 4, 7, and 9 are molecular weight marker fragments. The molecular weight of the marker is indicated in the margin.