guanine nucleotide exchange family protein. similar to guanine nucleotide exchange family protein [Arabidopsis thaliana] (TAIR:AT3G60860.1); similar to EDA10 (embryo sac development arrest 10), guanyl-nucleotide exchange factor [Arabidopsis thaliana] (TAIR:AT1G01960.1); similar to guanine nucleotide exchange family protein [Arabidopsis thaliana] (TAIR:AT4G35380.1); similar to unnamed protein product [Vitis vinifera] (GB:CAO47550.1); similar to putative guanine nucleotide-exchange protein GEP2 [Oryza sativa (japonica cultivar-group)] (GB:BAD35378.1); similar to putative guanine nucleotide-exchange protein GEP2 [Oryza sativa (japonica cultivar-