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Representative landmarks and functional elements on ricin toxin. Surface (top) and ribbon (bottom) PyMol representations of ricin toxin (PDB ID: 2AAI) at 120° rotations. Landmarks on RTA (gray) include the epitopes recognized by WECB2 (blue), SWB1 (magenta), SyH7 (orange), IB2 (green), and the active site (yellow). Landmarks on RTB (black) include the two galactose binding sites (lactose moieties in red) and subdomains 2α (pink) and 2γ (cyan).
