Glucagon-like peptides GLP-1 and GLP-2, predicted products of the glucagon gene, are secreted separately from pig small intestine but not pancreas. - Ørskov,C.; Knuhtsen,S.; Baldissera,F.G.; Poulsen,S.S.; Nielsen,O.V.; Holst,J.J. (Endocrinology, 1986)