Pulchellin, a highly toxic type 2 ribosome-inactivating protein from Abrus pulchellus cloning: heterologous expression of A-chain and structural studies - Silva, André L. C.; Goto, Leandro Seiji; Dinarte, Anemari R.; Hansen, Daiane; Moreira, Renato A.; Beltramini, Leila Maria; Araújo, Ana Paula Ulian de (FEBS Journal, 2005)