Genome projects produce a huge amount of sequence information. As a result, the focus of genomics research is turning toward deduction of functional information about newly discovered genes. Thus structural genomics paves the way for a new discipline called functional genomics by providing the information required for microarray manufacture. Microarray technology is the result of automation and miniaturization in the detection of differential gene expression. By using this technology one can make a parallel analysis of RNA abundance and DNA homology for thousands of genes in a single experiment. Over the past several years, this unique technology has been used to explore hundreds transcriptional patterns and genome differences for a variety of microbial species. Applications of microarrays extend beyond the boundaries of basic biology into diagnostics, environmental monitoring, pharmacology, toxicology and biotechnology. We describe comprehensive nature of DNA microarray technology with emphasis on fabrication of DNA microarrays and application of this technology in biological environment with primary accent on microbial systems.

Institute of Molecular Biology Centre of Excellence for Molecular Medicine of the Slovak Academy of Sciences 845 51 Bratislava Slovakia

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