Modulation of berberine bridge enzyme levels in transgenic root cultures of California poppy alters the accumulation of benzophenanthridine alkaloids.

Park, S.J., Yu, F.Q., and Facchini, P.J. (2003). "Modulation of berberine bridge enzyme levels in transgenic root cultures of California poppy alters the accumulation of benzophenanthridine alkaloids.", Plant Molecular Biology, 51(2), pp. 153-164.