The coding sequence of OsNPF7.6 for subcellular localization was amplified using the pMD19-T vector and ligated into pSAT6A-GFP [33 (link)] with the correct direction. The OsNPF7.6-GFP vector was transformed into Arabidopsis mesophyll protoplasts and identified by a laser scanning microscope (LSM410; Carl Zeiss, Jena, Germany). Plasma membrane dye FMTM4-64FX (Invitrogen, Life Technologies, Carlsbad, CA, USA) was used as marker.
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