Probably participates in a plant defense mechanism. Expressed in root, seed and nodule but not in flower, stem, shoot, leaf and pod. The presence of a 'disulfide through disulfide knot' structurally defines this protein as a knottin. Contains 3 disulfide bonds. This is a cyclic peptide. Belongs to the cyclotide family. Bracelet subfamily. This peptide is cyclic. The start position was chosen by similarity to cyclotide cter-B for which the DNA sequence is known.