Fig. 2From: Reduction of the contaminant fraction of DNA obtained from an ancient giant panda boneDNA Damage patterns in different pre-treatments. Fragment length distributions (density plots) of total DNA recovered (a–e, Additional file 4: Table S3). Occurrence of thymine bases at the 5′ ends of endogenous DNA reads where the corresponding base in the reference sequence is a cytosine (f)Back to article page