While free-living protists are usually subjected to hyposmotic environments, parasitic protists
are also in contact with hyperosmotic habitats. Recent work in one of these parasites …

Acidocalcisomes are acidic organelles rich in calcium and phosphorus that have been
conserved from bacteria to man. In parasitic protozoa acidocalcisomes possess enzymes …

Melanin is a complex polymer widely distributed in nature and has been described as an
important virulence factor in pathogenic fungi. In the majority of fungi, the mechanism of …

The aim of this work was to evaluate the general role of the vacuolar pyrophosphatase
proton pump (V-PPase) in sucrose accumulation in citrus species. First, three citrus V-PPase …

Acidocalcisomes are acidic organelles containing large amounts of polyphosphate (poly P),
a number of cations, and a variety of cation pumps in their limiting membrane. The vacuolar …

The structural organization of parasites has been the subject of investigation by many
groups and has lead to the identification of structures and metabolic pathways that may …

The scuticociliatosis is a very serious disease that affects the cultured turbot, and whose
causal agent is the anphizoic and marine euryhaline ciliate Philasterides dicentrarchi …

Trypanosomatid protozoa include heteroxenic species some of them pathogenic for men,
animals and plants. Parasite membrane contains ecto-enzymes whose active sites face the …

In this work, we show the kinetics of pyrophosphate-driven H+ uptake by acidocalcisomes in
digitonin-permeabilized promastigotes of Leptomonas wallacei. The vacuolar proton …

ATP-dependent Ca2+ uptake was studied in a subcellular fraction from Herpetomonas sp.
prepared by mechanical disruption and using 45Ca2+ as a tracer. The uptake was …