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Size of acidic organelles in Leishmania strains. Differences in the sizes of acidic organelles of Leishmania strains labeled with 75 nM Lysotracker Red were determined by confocal microscopy as described in Materials and Methods. Top row shows details of acidic organelles in Leishmania strains at the optimal voltage used to visualize each strain. Inserted values are volts. Bottom row shows corresponding differential interference contrast images.
