GlucagonReceptors, GlucagonMice, KnockoutGlucagon-Secreting CellsInsulinGene Knockout TechniquesLiverBlood GlucoseSomatostatinIslets of LangerhansGlucoseMice, Inbred C57BLHypoglycemiaProglucagonGluconeogenesisGlucagon-Like PeptidesPancreasPancreatic PolypeptidePancreatic HormonesGlucagon-Like Peptide 1EpinephrineRats, Inbred StrainsLiver GlycogenCyclic AMPReceptors, Gastrointestinal HormoneAdenylate CyclaseFastingDogsCells, CulturedHormonesC-PeptideHyperglycemiaSecretinKineticsAdenoma, Islet CellBucladesineLactatesDisease Models, AnimalFatty Acids, NonesterifiedPerfusionSomatostatin-Secreting CellsArginineGastric Inhibitory PolypeptideGastrointestinal HormonesTime FactorsGlucagonomaOxyntomodulinRNA, MessengerGene DeletionMice, Transgenic3-Hydroxybutyric AcidHomeostasisDiabetes Mellitus, ExperimentalDose-Response Relationship, DrugSecretory RateInsulin-Secreting CellsKetone BodiesSignal TransductionVasopressinsGene Expression RegulationPhosphorylasesRadioimmunoassayGlucose Tolerance TestAmino AcidsGlycerolGlycogenolysisGlycogenGene TargetingHydroxybutyratesHydrocortisonePhenotype