Biosynthesis of <i>N</i>-(purin-6-ylcarbamoyl)-<scp>l</scp>-threonine riboside. Incorporation of <scp>l</scp>-threonine <i>in vivo</i> into modified nucleoside of transfer ribonucleic acid

Abstract

l-[U-(14)C]Threonine is incorporated into N-(purin-6-ylcarbamoyl)-l-threonine riboside of rat liver and Escherichia coli tRNA. A pathway is suggested for the biosynthesis of this nucleoside.