DNA/RNA Basen DNA/RNA DNA/RNA H2N O N Nucleobasen N NH2 N N N H N N Nucleoside N H N N N HO O OH R R=H,OH R=H,OH Adenosin A HO O O P O O- - N O OH Adenosin-5'-phosphat O N O OH Cytidin C Thymidin T NH2 N N N HO N O O O P OO- Adenosin-3'-phosphat Watson-Crick-Basenpaarung: G-C, A-U (Helix in DNA) O NH OH R R=H,OH N O Uracil O HO O N N H Thymin N NH2 N NH O N NH2 Nucleotide O N H O NH Guanosin G N O NH2 O OH R RNA NH Cytosin O N N HO NH2 Guanin NH2 DNA N NH N H Adenin DNA/RNA NH O HO N O OH OH Uridin U O Hoogsteen-Basenpaarung / nicht-Watson-Crick-Basenpaarung: A-T, G-U, A-A (in DANN-Protein-Komplexen, Triplex-DNA) Triplex
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