Page 282 - Color Atlas of Biochemistry
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Digestion      273


                        A. Monosaccharides

                                                                                               2 K
                                                                                               3 Na
                        Poly-
                        saccharides                          2 K
                                        Na   glucose                     3                     Glucose
                                        symporter                   ATP       ADP              transporter
                                                                              P i
                                           Na                  Na
                                 Glucose                       Glucose
                                 Galactose                     Galactose
                           1                               *                                         Portal
                                                                                                     vein
                       α-Amylase        Fructose               Fructose
                                        Other mono-            Other mono-
                                        saccharides            saccharides


                                                                                                   Liver
                                                                             1 α-Amylase 3.2.1.1

                                                                                Disaccharidases
                                                                             2
                                                       2                        Oligosaccharidases
                                                                              3  Na  /K  -exchanging
                                    Oligo-                                      ATPase 3.6.1.37
                                    saccharides
                                                           Intestinal         * Secondary-active transport
                                                           epithelial cell      Facilitated diffusion

                        B. Lipids
                                            Intestinal
                       Triacyl-             lumen
                       glycerol                                        Fat
                                                                       synthesis                  Lymph
                                                             P

                                      4                                                           Thoracic
                                                           Glyco-                   Fat           duct
                                                           lysis                    synthesis
                                                                  3x
                       Diacyl-                                               S  A
                       glycerol                                                    2x
                                                              A                                    Blood
                                                                 P            PP
                                                                       5                 Short-chain
                                                                                         fatty acids
                                                           A
                                      4                       PPP            S  A
                                                                                                  Portal
                                                                                                  vein
                                            Fatty acids
                       2-Mono-
                       acyl-                     80%
                       glycerol
                                                           Resorption
                                      4                                                            Liver



                       Glycerol
                                                 20%       Intestinal        4 Triacylglycerol lipase 3.1.1.3
                                                           epithelial cell
                                                                             5 Fatty acid-CoA ligase 6.2.1.3
                                                                               Stimulated by bile salts,
                                                                               phospholipids, colipase and Ca 2









           Koolman, Color Atlas of Biochemistry, 2nd edition © 2005 Thieme
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