Chemoreception is mediated in Caenorhabditis elegans by members of the seven-transmembrane G-protein-coupled receptor class (7TM GPCRs) of proteins which are of the serpentine type. Srj is part of the Str superfamily of chemoreceptors. The srj family is designated as the out-group based on its location in preliminary phylogenetic analyses of the entire superfamily. Chemoperception is one of the central senses of soil nematodes like C. elegans which are otherwise 'blind' and 'deaf'.
Jiyao W et al.(2023). "The conserved domain database in 2023.",