HORDE

Symbols to the mouse and rat OR repertoires were assigned using the Mutual Maximum Similarity (MMS) algorithm, a systematic human-based classifier. Mutual-best-hits are first identified and assigned the symbol of the human best match gene, provided that their similarity is >=80%. At a second stage, the algorithm searches for additional orthology candidates with highest similarity to their human partner (>=80%), by allowing more than a single ortholog. The mouse and rat OR symbols , such as Or10aa4-ps, use the Or root and indicate the gene is "olfactory receptor family10 subfamily aa member 4", with the optional "ps" suffix to indicate a pseudogene. The symbols for candidate co-orthologs are, for example, Or10d4, Or10d4b and Or10d4c, with Or10d4 being the mutual-best-hit.