Has low levels of endoglucanase activity. May be involved in the degradation of cellulose or lignocellulose, chitin, or other polysaccharides. Endohydrolysis of (1->4)-beta-D-glucosidic linkages in cellulose, lichenin and cereal beta-D-glucans. Monomer. By cellulose, lactose and sophorose. Belongs to the glycosyl hydrolase 61 family.