This family contains a number of fungal cerato-platanin phytotoxic proteins approximately 150 residues long. Cerato-platanin contains four cysteine residues that form two disulphide bonds [1].

1: Purification, characterization, and amino acid sequence of cerato-platanin, a new phytotoxic protein from Ceratocystis fimbriata f. sp. platani. Pazzagli L, Cappugi G, Manao G, Camici G, Santini A, Scala A; J Biol Chem 1999;274:24959-24964. PMID:10455173