GPA1 (G PROTEIN ALPHA SUBUNIT 1); signal transducer. Identical to Guanine nucleotide-binding protein alpha-1 subunit (GPA1) [Arabidopsis Thaliana] (GB:P18064); similar to XLG3 (EXTRA-LARGE GTP-BINDING PROTEIN 3), signal transducer [Arabidopsis thaliana] (TAIR:AT1G31930.1); similar to XLG3 (EXTRA-LARGE GTP-BINDING PROTEIN 3), signal transducer [Arabidopsis thaliana] (TAIR:AT1G31930.2); similar to G protein alpha subunit [Phaseolus lunatus] (GB:BAF30964.1); similar to hetrotrimeric G protein alpha subunit [Phaseolus vulgaris] (GB:ABV60388.1); similar to Guanine nucleotide-binding protein alpha-1 subunit (GP-alpha-1) (GB:P49082); contains Inter