immobilized n ( 6 ) - ( delta ( 2 ) -isopentenyl ) adenosine antibodies retained trnas containing n ( 6 ) - ( delta ( 2 ) -isopentenyl ) adenosine and n ( 6 ) - ( 4-hydroxy-3-methylbut-2-enyl ) adenosine with equal efficiencies .
C0022218
isopentenyl
C0001443
adenosine