This family includes a number of gustatory and odorant receptors mainly from insect species such as A. gambiae and D. melanogaster. They are classified as G-protein-coupled receptors (GPCRs), or seven-transmembrane receptors. They show high sequence divergence, consistent with an ancient origin for the family [1,2].

1: Molecular evolution of the insect chemoreceptor gene superfamily in Drosophila melanogaster. Robertson HM, Warr CG, Carlson JR; Proc Natl Acad Sci U S A 2003;100:14537-14542. PMID:14608037

2: G protein-coupled receptors in Anopheles gambiae. Hill CA, Fox AN, Pitts RJ, Kent LB, Tan PL, Chrystal MA, Cravchik A, Collins FH, Robertson HM, Zwiebel LJ; Science 2002;298:176-178. PMID:12364795