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An amine, after dansylation, has been isolated from Nicotiana tabacum crown gall tumours for the first time and characterized as 4-hydroxy-3-methoxy-beta-phenylethylamine (3-methoxytyramine). The compound cannot be detected in differentiated N. tabacum tissues but appears in the corresponding callus controls. Its concentration is further increased 5-42-fold when N. tabacum is transformed with all strains of Agrobacterium tumefaciens so far tested.

Enhanced 3-methoxytyramine levels in crown gall tumours and other undifferentiated plant tissues