Assertion: guanine | /r/HasProperty | a pyrimidine base
Facets:
Source sentences:
text: The binding of the two chains occurs between their nitrogenous bases and always obeys the following rules: adenine (A), a purine base, binds with thymine (T), a pyrimidine base; and guanine (G), a purine base, binds to cytosine (C), a pyrimidine base.