Probable subunit of an amino acid transporter involved in the regulation of the amino acid metabolism. Stimulates amino acid export by activating nonselective amino acid facilitators. Expressed in the vascular tissues. The VIMAG motif is necessary for the function of the protein. Overexpression of GLUTAMINE DUMPER 2 leads to free amino acid levels accumulation and plant size decrease (Ref.8, PubMed:20018597). Belongs to the GLUTAMINE DUMPER 1 (TC 9.B.60) family.