G-protein components found in genome or EST databases of the land plant kingdom.

Homologous genes of A.thaliana AtGPA1, AGB1, AGG1, AGG2, AGG3 and AtRGS1 were identified with translated protein BLAST against plant genome database through Phytozome v7.0 (released on Apr/8/2011; www.phytozome.net), PlantGDB database (http://www.plantgdb.org/), EST database registered in NCBI (www.ncbi.nlm.nih.gov), and EST database of M. polymorpha (More than 2 million sequence tags, http://Marchantia.pmb.lif.kyoto-u.ac.jp). (1) All RGS genes were predicted to have 7- or 5-transmembrane domain, except with non-transmembrane S. italica RGS. (2) DNA sequences with ∼28,000 gene predictions of P. dactylifera were downloaded from Weill Cornell Medical College in Qatar (http://qatar-weill.cornell.edu/research/datepalmGenome/download.html). G protein components were found with local BLAST search. (3) Sequence of G protein components was collected from EST database. Note that there might be unidentified G protein components in their species.*indicates species whose complete genome sequence is available from NCBI.+indicates not analyzed.#indicates none identified.