Research Article

Evolution by polyploidy and gene regulation in Anura

• Maria Luiza Beçak, Leonardo Setsuo Kobash

Research Article

Diagnosis of human visceral leishmaniasis by PCR using blood samples spotted on filter paper

• Eduardo Sergio da Silva, Célia Maria Ferreira Gontijo,Raquel da Silva Pacheco and Reginaldo Peçanha Brazil

Research Article

A low prevalence of cystic fibrosis in Uruguayans of mainly European descent

• Horacio Cardoso, Beatriz Crispino, Adriana Mimbacas and Manuel Enrique Cardoso

Research Article

Standardization of conditions for the metabolic activation of N-nitrosodiethylamine in mutagenicity tests

• Claudia Alessandra Fortes Aiub, Luis Felipe Ribeiro Pinto and Israel Felzenszwalb

Research Article

Genetic organization and expression of citrate permease in lactic acid bacteria

• Djamel Drider, Sadjia Bekal and Herve Prevost

Research Article

Knockdown of chimeric glucoce rebrosidase by green fluorescent protein-directed small interfering RNA

• Tessa N. Campbell, Francis Y.M. Choy

Research Article

Patau syndrome with a long survival. A case report

• A.C. Duarte, A.I.C. Menezes, E.S. Devens, J.M. Roth, G.L. Garcias and M.G. Martino-Roth

Research Article

Comparative cytogenetic studies of Curimatidae (Pisces, Characiformes) from the middle Paran�?¡ River (Argentina)

• M.S. Brassesco, M.C. Pastori, H.A. Roncati and A.S. Fenocchio

Book Review

Microcompetition with Foreign DNA and the Origin of Chronic Disease

• Hanan Polansky