Fig. 4
Detection of the polymorphic insertion HERV-K (HML-2) loci in three individuals. Volcano diagram exhibiting the polymorphic HERV-K (HML-2) loci between every two individuals. EdgeR was used to calculate the differential CPMs of the same loci in different individuals. If the fold change of the CPMs was higher than 20 and p-value less than 10−10, the locus was defined as polymorphic (highlighted by red). In total, there were 14 polymorphic loci with solo-LTR330 and N6p21.32 being reported for the first time as polymorphic (black frames)