Balzarini, J., J. Neyts, M. Hosoya, E. Van Damme, W. Peumans, and E. De Clercq. 1992. The mannose-specific plant lectins from Cymbidium hybrid and Epipactis helleborine and the (N-acetylglucosamine)n-specific plant lectin from Urtica dioica are potent and