Organic saliva composition Proteins: 1)Digestive enzymes: a-amylase:hydrolyses the a-1,4 glycosidic linkages of starch molecules Lipase:an enzyme able to break down dietary triglycerides. 2)Proteins with lubricating functions:Mucins(粘蛋白) 3)Calcium binding proteins::statherin(富酪蛋白) 4)Carbon dioxide hydration: Carbonic anhydrase:catalyse the reversible hydration of CO2.to carbonic acid. 5)Saliva proteins with antimicrobial functions: secretory IgA(slgA),mucins,lysozyme and lactoferrin(乳铁蛋白). 6)Growth factors in saliva: epidermal growth factor(EGF),Transforming growth factors(TGF-aand fibroblast growth factor(FGF)Organic saliva composition Proteins: 1) Digestive enzymes: α-amylase: hydrolyses the α-1,4 glycosidic linkages of starch molecules Lipase: an enzyme able to break down dietary triglycerides. 2) Proteins with lubricating functions: Mucins(粘蛋白) 3) Calcium binding proteins: statherin（富酪蛋白） 4) Carbon dioxide hydration: Carbonic anhydrase: catalyse the reversible hydration of CO2 . to carbonic acid. 5) Saliva proteins with antimicrobial functions: secretory IgA (sIgA), mucins, lysozyme and lactoferrin（乳铁蛋白）. 6) Growth factors in saliva: epidermal growth factor (EGF) , Transforming growth factors (TGF-a and TGF-P) , fibroblast growth factor (FGF)