Phylogenetic tree of 5 RecQ homologous proteins in Human and Cow. A neighbor-joining tree, based on the Dayhoff distance, and rooted with RMI1 proteins. Rooted with RMI1. Genbank accession numbers are given in square brackets. Putative protein sequences of cow BLM, WRN and RecQL5 are designated as 'predicted' (from the Bovine Genome Database; ).