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. 1999 Apr;119(4):1447–1456. doi: 10.1104/pp.119.4.1447

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Comparison of the N-terminal sequences from RIPs. RIC, Ricin A-chain from Ricinus communis; RCA, agglutinin from R. communis; ABR, abrin A-chain from Abrus precatorius; LUFa and LUFb, luffin-a and luffin-b from Luffa cylindrica; TRI, trichosanthin from T. kirilowii; MOM, momordin from Momordica charantia; SAP, saporin from Saponaria officinalis; and BAR, barley translation inhibitor from barley (Funatsu et al., 1991). Shaded boxes and boldface characters represent two amino acids that are conserved in all RIPs currently reported. Shaded boxes and lightface characters symbolize homology regions among ME1, ME2, and MAP. The asterisk shows the presence of conserved amino acids with polar R groups (hydrophobic).