The B. germanica LpR in the context of lipoprotein receptors. Maximum-likelihood phylogenetic tree showing the position of B. germanica LpR with respect to vertebrate and invertebrate lipoprotein receptors. The yolk receptor (RME-2) of the nematode C. elegans and the VgR of the tick D. variabilis were used as out-groups. Branch lengths are proportional to sequence divergence. The bar represents 0.2 differences per site. Bootstrap values based on 100 replicates are shown on the nodes. The original label for function has been indicated on each species. If there is no functional annotation, then the accession number is indicated. The complete binomial name of the species and the accession number can be found in the corresponding section of Methods.