Contributes to surface hydrophobicity, which is important for processes such as association of hyphae in reproductive structures, dispersal of aerial spores and adhesion of pathogens to host structures. Homodimer; in solution, the protein monomers form rodlet-like and insoluble aggregates. Cell wall of aerial hyphae. Abundantly secreted from the tips of submerged hyphae. Abundantly expressed during formation of fruiting bodies (expressed in monokaryons and dikaryons). Accumulates in the walls of the individually growing aerial mycelium. Belongs to the fungal hydrophobin family.