Gustatory and odorant receptor which mediates acceptance or avoidance behavior, depending on its substrates. Gr21a and Gr63a together are sufficient for carbon dioxide detection and avoidance behavior. It is possible that the CO(2) receptors Gr63a and Gr21a activate the TRPC channels through Galpha49B and Plc21C. This innate olfactory avoidance behavior can be inhibited by inhibitory interactions of the odors such as 1-hexanol and 2,3-butanedione with Gr21a and Gr63a.

Belongs to the insect chemoreceptor superfamily. Gustatory receptor (GR) family. Gr21a subfamily.

454 amino acids

MTFLDRTMSFWAVSRGLTPPSKVVPMLNPNQRQFLEDEVRYREKLKLMARGDAMEEVYVRKQETVDDPLELDKHDSFYQTTKSLLVLFQIMGVMPIHRNPPEKNLPRTGYSWGSKQVMWAIFIYSCQTTIVVLVLRERVKKFVTSPDKRFDEAIYNVIFISLLFTNFLLPVASWRHGPQVAIFKNMWTNYQYKFFKTTGSPIVFPNLYPLTWSLCVFSWLLSIAINLSQYFLQPDFRLWYTFAYYPIIAMLNCFCSLWYINCNAFGTASRALSDALQTTIRGEKPAQKLTEYRHLWVDLSHMMQQLGRAYSNMYGMYCLVIFFTTIIATYGSISEIIDHGATYKEVGLFVIVFYCMGLLYIICNEAHYASRKVGLDFQTKLLNINLTAVDAATQKEVEMLLVAINKNPPIMNLDGYANINRELITTNISFMATYLVVLLQFKITEQRRIGQQQA

52.8 kDa

(Note: Representative image - actual molecular weight may vary depending on tag type and expression method)

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