Source: https://fm.univ-ouargla.dz/images/Livres_Biblioth%C3%A8que/les_livres/biologie/610.527_Biologie_mol%C3%A9culaire_UE1_PACES__1re_ann%C3%A9e_sant%C3%A9.Beaumont_Simon-ilovepdf-compressed.pdf