A novel sucrose/H+ symport system and an intracellular sucrase in Leishmania donovani

► Identification of transmembrane sucrose transport system in Leishmania donovani. ► This highly sucrose-specific transporter functions as a sucrose-proton symporter. ► The kinetics of this system are biphasic in promastigotes and monophasic in amastigotes. ► Demonstration of the presence of a stable pool of intracellular sucrase in promastigotes.