Self-assembles at hydrophilic-hydrophobic interfaces on hyphal surface. Reduces water surface tension dramatically upon assembly at the water-air interface. Probable role in growth of aerial hyphae. Several N-termini starting at positions 17, 20, 22, 28 and 48 have been identified by direct sequencing. Contains a number of intrachain disulfide bonds. Not glycosylated. Belongs to the cerato-ulmin hydrophobin family.