HOCH2∠O、OH HO H β-2- deoxyribose
-2’-deoxyribose 2
Sugar Pucker" Conformations A dNA Base Base 3′-endo 3-endo,2′exo B DNA Base Base 2′-endo 2′-endo.3′exo
Sugar “Pucker” Conformations A DNA B DNA 3
Pyrimidines NH H—N。45C-CH 3 5C—H 0=C216C-H Thymine Cytosine (C) NH2 Purines H-N. 6 5C H-C3,4。8CH H2N-CS3CN Adenine Guanine (A) (G)
Pyrimidines Purines 4
Base tautomerization G(Keto G(Enol) A N A2N 2N 9999 0.01
G (Keto) G (Enol) A 99.99% 0.01% Base Tautomerization 5
NH NH N N N N C CH CH HC C HC C HOCH2O O-P-0-P-0—POCH2O O H H o H HO H Deoxyadenosine Deoxyadenosine 5-triphosphate (A nucleoside) (dATP) A nucleotide Base Nucleoside Nucleotide Adenine Deoxy )adenosine (d)A(mono, di-, tri) phosphate Guanine Deoxy )guanosi (dG(mono, di-, tri) phosphate Thymine Deoxy )thymidine (dT(mono, di-, tri) phosph Cytosine Deoxy )cytidin Ine (d)C(mono, di- tri) phosphate
Base Adenine Guanine Thymine Cytosine Nucleoside (Deoxy)adenosine (Deoxy)guanosine (Deoxy)thymidine (Deoxy)cytidine Nucleotide (d)A (mono, di-, tri) phosphate (d)G (mono, di-, tri) phosphate (d)T (mono, di-, tri) phosphate (d)C (mono, di-, tri) phosphate 6 1’ 9