1. Department of Biochemistry and Molecular Biology; Federal University of Ceara; Campus do Pici, s/n, Bloco 907 Fortaleza CE 60451-970 Brazil
2. Department of Physiology and Pharmacology; Federal University of Ceara; Cel. Nunes de Melo 1127 Fortaleza CE 60430-270 Brazil
3. Department of Biophysics and Pharmacology; Federal University of Rio Grande do Norte; Av. Sen.Salgado Filho 3000 Natal RN 59072-970 Brazil
4. Department of Biochemistry; Federal University of Rio Grande do Norte; Av. Sen. Salgado Filho 3000 Natal RN 59072-970 Brazil