Identify cellulytic bacteria: medium zymogram by combining (grams per liter): 2 gr of sodium nitrate , 1 gr of dipotassium hydrogen phosphate , 0.5 gr of magnesium sulfate , 0.5 gr of potassium chloride , 2 grams of carboxymethyl cellulose , 0.2 g peptone for microbiology and 17 grams of agar.