Expressed exclusively in flowers, in male and female organs, petals and pedicels. Not detected in pollen grains or sepals. Highly expressed in immature flowers, but progressively decrease as flowers mature and senesce. Up-regulated by methyl jasmonate. Belongs to the jacalin lectin family. The gene has been cloned in cv. Landsberg erecta, but the tissue specificity, developmental stage and induction have been determined in cv. Columbia (PubMed:11678272).