under these conditions , actively growing callus contained 2 and 0.5 nmol of the cytokinins zeatin [ io ( 6 ) ade ; 6- ( 4-hydroxy-3-methylbut-2-enylamino ) purine ] and n ( 6 ) - ( delta ( 2 ) -isopentenyl ) adenine ( i ( 6 ) ade ) , respectively , per gram ( fresh weight ) .
C0010815
cytokinins
C0043456
zeatin