Van der Waals-London interactions and the configuration of hydrogen-bonded purine and pyrimidine pairs.
D000225:Adenine; D055598:Chemical Phenomena; D002627:Chemistry, Physical; D003596:Cytosine; D006147:Guanine; D006859:Hydrogen; D011687:Purines; D011743:Pyrimidines; D013941:Thymine
D011687:Purines; D011743:Pyrimidines; D006147:Guanine; D006859:Hydrogen; D003596:Cytosine; D000225:Adenine; D013941:Thymine