Glycolate/glycerate transporter required for photorespiration. Expressed in leaves, stems and flowers, but not in roots. Interveinal chlorotic and premature necrotic leaves. Bleached leaf phenotype when grown under ambient air, but normal growth under CO(2)-enriched air. Belongs to the CidB/LrgB family. Was initially thought to be involved in chloroplast development or function against cell death (PubMed:21916894 and PubMed:22180599).