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Vitamins      367


                 A. Water-soluble vitamins I



                * Adult daily                               Vitamin          Active form:    Function in
                *requirement                                                 coenzyme        metabolism


                 B 1                  CH 3
                                                                                             Transfer of
                        N         N                        Thiamine               TPP        hydroxy-
                                          CH 2  CH 2 OH                                      alkyl residues
                   H 3 C  N     NH 2  S                    1.5 mg *             Thiamine
                                                                                diphosphate
                                                           Grain
                                                           Yeast products
                                                           Pork
                 B 2         O
                                  N          CH 3
                         HN
                                                                                 F
                        O    N    N          CH 3
                                                                                    FMN      Hydrogen
                                   CH 2                     Riboflavin
                                                                                 F   A       transfer
                               H   C  OH                                                FAD
                                                           1.8 mg*
                               H   C  OH
                                                           Milk
                               H   C  OH                   Eggs
                                   CH 2 OH


                                4-Aminobenzoate residue
                                               O                                             C -
                        OH       HN          C     COO      Folate                            1
                                                                                   THF       metabolism
                             N    CH 2         NH  CH
                      N                                     0.2 mg*            Tetrahydro-
                                                   CH 2                        folate
                  H 2 N  N   N                     CH 2     Fresh green
                                                            vegetables
                                                   COO      Liver
                  Pteridine derivative             Glu


                                                                                  N   A
                                              O                                        P
                                                           Nicotinate                        Hydride
                             COO                           Nicotinamide          NADP        transfer
                                                NH 2
                                                                                  N   A
                                                           20 mg*
                       N                N
                                                           (or 1.2 g tryptophan)  NAD
                   Nicotinate          Nicotinamide
                                                           Meat, yeast products
                                                           Fruit and vegetables





                        H C   CH  O
                         3      3
                            C    C          COO            Pantothenate               S      Activation
                                    N                                             A          of carboxy-
                                    H                                                        lic acids
                        HO    OH                           7 mg*                   CoA
                                      β-Alanine
                        Pantoinate                         Widely
                                                           distributed






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