Conservation of the BRCA2/ZAR2 genetic arrangements in vertebrates. (A) Relative chromosomal locations of BRCA2 and ZAR2 genes in different vertebrates. The maps were obtained from NCBI site for Entrez genes http://www.ncbi.nlm.nih.gov/sites/entrez?db=gene&term=BRCA2+ Not drawn to the scale. (B) Dendrogram with branch lengths for the ZAR2 proteins from different vertebrates. The putative ZAR2 protein amino acid sequences were mined from the NCBI Entrez database and dendrogram with branch length was analyzed by CLUSTALW program http://align.genome.jp/.