incorporation levels of the [ ( 15 ) n ( 5 ) ] adenine after 8 hours of incubation , expressed as a percentage of the endogenous cytokinins , were as follows : zeatin ( 1.0 % ) , zeatin riboside ( 1.5 % ) , and zeatin riboside 5'-phosphate ( 10.2 % ) .
C0010815
cytokinins
C0043456
zeatin