Succus entericus or intestinal juice (pH=7.8) refers to the secretion of glands of small intestine. It contains many enzymes viz maltase, isomaltase, lipase, lactase, ₫-dextrinase, enterokinase, aminopeptidase, nucleotidase, nucleosidase, etc., for the digestion of carbohydrates, proteins, fats, nucleic acids etc. Enzyme nuclease is not a digestive enzyme. It is not present in any digestive juice.