(A): Elution profile of Micrurus mipartitus venom proteins by RP-HPLC. Two mg of venom was fractionated on a C18 column, as described in the materials and methods. The numbers show the fractions selected for evaluation of the lethal effect. Numbers in blue indicate the fractions that they showed a lethal effect in mice and numbers in red indicate the most lethal and abundant fractions and those used as immunogens. (B): Lethal fractions were analyzed by 15% gradient SDS-PAGE under non-reducing conditions. Mm7: fraction 7, Mm8: fraction 8, Mm20: fraction 20 and Mm21: fraction 21, molecular mass markers indicated in the left (kDa). (C): Mm8 (50 µg) and (D): Mm20 (100 µg) toxin purity profile by RP-HPLC, as described in the materials and methods.