Growth phase and medium pH modulate the expression of proteinase activities and the development of megasomes in axenically cultivated Leishmania (Leishmania) amazonensis amastigote-like organisms - Pral, Elizabeth Mieko Furusho; Moitinho, Maria da Luz Ribeiro; Balanco, José Mário de Freitas; Teixeira, V R.; Milder, Regina Vugman; Alfieri, Silvia Celina (Journal of Parasitology, 2003)