Galactose-specific adhesion protein essential for non-sexual flocculation and filamentous growth. Required for adhesion and filamentous growth through recognition of galactose residues on cell surface glycoconjugates (PubMed:22098069). Induces flocculation when overexpressed (PubMed:23236291). Abolishes adhesion and invasive growth. Belongs to the mam3/map4 family.