Western analysis of B. napus Cel16 protein in crude leaf homogenate. Lane 1, Prestained 75-kD molecular mass marker protein; lane 2, the Cel16 antiserum (dilution 1:1,500, w/v) recognizes a 72-kD protein in the crude B. napus leaf homogenate (total protein loaded was 1.0 μg); lane 3, prestained 68-kD molecular mass marker protein.