transcription, транскрипция: [ (ˌ)mər-ˌkap-tə-ˈpyu̇r-ˌēn ]
noun
Etymology: mercapt an + -o- + purine
Date: circa 1952
: an antimetabolite C 5 H 4 N 4 S that interferes especially with the metabolism of purine bases and the biosynthesis of nucleic acids and that is sometimes used in the treatment of acute leukemia