This pathway was created using the GPCRDB (Horn et al., 1998), http://www.gpcr.org/7tm/ (originally at http://www.cmbi.kun.nl/7tm/). The groupings are based on the GPCR phylogenetic tree available from the GPCRDB and the training sets used by Karchin et al. (Bioinformatics, 2002, pg. 147-159). The labels indicate children and grandchildren of the various classes of GPCRs as described by these references.
Karchin R, Karplus K, Haussler D; ''Classifying G-protein coupled receptors with support vector machines.''; Bioinformatics, 2002 PubMed
Horn F, Weare J, Beukers MW, Hörsch S, Bairoch A, Chen W, Edvardsen O, Campagne F, Vriend G; ''GPCRDB: an information system for G protein-coupled receptors.''; Nucleic Acids Res, 1998 PubMed