Thymine-Adenine	Cytosine-Guanine
Color Codes C H N O P S Cl F  Click-hold mouse button to move structure.  Click "x" box to toggle between structures.   Optimal view Hydrogen bonds represented bydashed lines.  Move manually to match left window Hydrogen bonds represented by dashed lines.   Spacefill / ball & stick   Wireframe / ball & stick   Spacefill / ball & stick   Wireframe / ball & stick