SEARCH Articles Figures Tables Demethylation and translocation of ricinine from the yellow leaf to the adjacent green leaf of the castor bean plant cutting with one green and one yellow leaf, a— Ricinine in yellow leaves b—demethylated ricinines in yellow leaves c—ricinine in stems d—demethylated ricinines in stems e—demethylated ricinines in green leaves —ricinine in green leaves g— green leaf h—yellow leaf . Courtesy of Peigamon Press, Ltd., copyright 1972. [Publishers Imprint]