Challenges to the gene concept have shown the difficulty of preserving the classical molecular concept, according to which a gene is a stretch of DNA encoding a functional product (polypeptide or RNA). The main difficulties ...

The plant family Rosaceae is comprised of a highly diverse group of plants, with a wide range of ornamental and agricultural uses throughout the world. Comparative genomic analyses between rosaceous species are increasingly ...

Background: Chagas disease patients with longstanding megaesophagus have a significantly increased risk for esophageal carcinoma. Materials and Methods: PCR-SSCP analysis and DNA sequencing of esophageal mucosa from Chagas ...

Background: Chagas disease patients with longstanding megaesophagus have a significantly increased risk for esophageal carcinoma. Materials and Methods: PCR-SSCP analysis and DNA sequencing of esophageal mucosa from Chagas ...