BetainePepsin ALipotropic AgentsPepsinogensSarcosineCholineBetaine-Homocysteine S-MethyltransferaseGastric JuicePepstatinsOsmotic PressureWater-Electrolyte BalanceRespiratory AspirationProlinePentagastrinSodium ChlorideOsmolar ConcentrationHomocysteinePepsinogen AGastric MucosaHydrogen-Ion ConcentrationHomocystinuriaMethioninePancreatinNorleucineChymosinAmino Acid SequenceAmino Acids, DiaminoAmino Acids