Probably participates in a plant defense mechanism (Potential). Binds to and induces leakage in phospholipd membranes, particularly ones containing 1-palmitoyl-2-oleophosphatidylethanolamine (POPE) (PubMed:26322745). In vitro, displays cytotoxicity against cultured cells but no hemolytic activity towards fresh erythrocytes (PubMed:26322745). Not active against Gram-negative bacterium E.coli ATCC 25922 or Gram-positive bacterium S.aureus ATCC 25923 up to a concentration of 64 uM (PubMed:26322745). The presence of a 'disulfide through disulfide knot' structurally defines this protein as a knottin. This is a cyclic peptide. Contains 3 disulfide bonds. Belongs to the cyclotide family. Moebuis subfamily. This peptide is cyclic. The start position was chosen by similarity to Oak1 (kalata B1) for which the DNA sequence is known.