purine base
noun
: any of a group of crystalline bases comprising purine and bases derived from it (as adenine, caffeine, guanine, theobromine, or xanthine) some of which are components of nucleosides and nucleotides
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“Purine base.” Merriam-Webster.com Medical Dictionary, Merriam-Webster, https://www.merriam-webster.com/medical/purine%20base. Accessed 24 May. 2025.
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