Page 85 - Miracles Within the Molecule
P. 85

ADNAN OKTAR


                                                                 All of the 20 amino
                                                                 acids that make up
                                                                pro teins pos sess a
                                                                 com mon struc ture.
                                                                 The only thing that
                                                                 dis tin guish es any
                                                                one from the oth ers
                                                                  is its side chains.
                                                                Due to the dif fer ent
                                                                  atoms and bonds
                                                                  acquired by side
                                                               chains, they pos sess
                                                                dif fer ent struc tures,
                                                                which per mit the 20
                                                               dif fer ent amino acids
                                                                 to give rise to 10 130
                                                                  dif fer ent pro teins
                                                                     with dif fer ing
                                                                sequen ces. This, of
                                                                course, is a match -
                                                                     less cre a tion.









             sess dif fer ent struc tures and elec tri cal char ges and dif fer ent lev els of sol -
             u bil i ty in water.
                 In order to give rise to pro teins, amino acids attach to one anoth er
             by means of what's known as pep tide bonds. The arrange ment of amino
             acids, attached by pep tide bonds, deter mines the pro teins' three-dimen -
             sion al struc ture. Proteins assume dif fer ent func tions accord ing to their
             struc tures and use the cell's chem i cal reac tions in var i ous sta ges. If a cell
             needs ener gy, pro teins per form dif fer ent chem i cal reac tions. If the cell
             requires amino acids, the pro teins break down into amino acids. In
             addi tion, pro teins also act like build ing bricks in the cell mem brane. In
             short, pro teins are used almost every where through out the cell.  30
                 A pro tein's three-dimen sion al struc ture deter mines its func tions. A
             pro tein mol e cule that's tensed or curved, fold ed at ran dom, is bio log i -
             cal ly unus a ble. In order for a pro tein to func tion prop er ly, its atoms
             must be set out in an appro pri ate man ner. Any pro tein that pos sess es




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