Abstract
Leishmania is auxotrophic for amino acids and nutrients and has a specific transport for L-arginine mediated by amino acid porter-3 (AAP3) inpromastigote and amastigote forms. This transporter is encoded in two copies in the parasite's genome, one of which is regulated by the presence of the amino acid itself, externally or internally, in addition to pH, temperature and parasite arginase …