Probably participates in a plant defense mechanism. Expressed in leaf, fruit, pedical and stem but not in root (at protein level). The presence of a 'disulfide through disulfide knot' structurally defines this protein as a knottin. This is a cyclic peptide. Belongs to the cyclotide family. Moebius subfamily. This peptide is cyclic. The start position was chosen by similarity to chassatide C4 for which the DNA sequence is known.