A number of isoforms are produced. According to EST sequences. Expressed in the apical meristem 4 days after imbibition (DAI). Expressed in the major veins of rosette leaves and pedicels. Expressed in the root central cylinder, root meristems, root tips and lateral root primordia. Expressed in gynoecium development, disappearing after pollination. Belongs to the nucleobase:cation symporter-2 (NCS2) (TC 2.A.40) family.