piāolíng/ angolul

purine [purines]▼(organic heterocyclic base)
noun
[UK: pjˈʊriːn] [US: pjˈʊriːn]

adenine [adenines]▼(base that pairs with thymine or uracil)
noun
[UK: ˈæ.də.niːn] [US: ˈæ.də.ˌnin]