the unusual transfer ribonucleic acid ( rna ) anticodon adjacent modified nucleoside n- [ ( 9-beta-d-ribofuranosylpurin-6-yl ) carbamoyl ] threonine , t6a , and its n6-methyl ( mt6a ) and 5'-phosphate ( pt6a ) derivatives are efficient ligands for magnesium and manganese ions , as demonstrated by potentiometry and nuclear magnetic resonance spectroscopy .
C0035711
transfer ribonucleic acid
C0003284
anticodon