Isolation and characterization of a mutant dihydrofolate reductase- thymidylate synthase from methotrexate-resistant Leishmania cells

1. Arrebola, R.
2. Olmo, A.
3. Reche, P.
4. Garvey, E.P.
5. Santi, D.V.
6. Ruiz-Perez, L.M.
7. Gonzalez-Pacanowska, D.