Endoglucanase with some exoglucanase activity. Endohydrolysis of (1->4)-beta-D-glucosidic linkages in cellulose, lichenin and cereal beta-D-glucans. Optimum pH is about 7.0. Optimum temperature is about 42 degrees Celsius. Belongs to the glycosyl hydrolase 5 (cellulase A) family.