A schematic phylogenetic tree of 11 Bovid species representing Bovidae’s two subfamilies and seven tribes. Three species from two other ruminant families were used as outgroups (giraffe and deers). Each circle represents an insertion of the Bov-A2 retroposon element into the TP53 P1 promoter. The arrow indicates its orientation. A continuous line indicates sequences which were determined experimentally, whereas a dashed line indicates sequences obtained by bioinformatics means.