F10318 FilmTracer™ SYPRO® Ruby biofilm matrix stain has been used to stain matrices of biofilms. This stain was originally used as a gel stain that labels most classes of proteins, including glycoproteins, phosphoproteins, lipoproteins, calcium binding proteins, fibrillar proteins and other proteins that are difficult to stain. FilmTracer™ SYPRO® Ruby biofilm stain comes in a convenient, ready to use 1X concentration.