Abstract
Summary The ribosomal RNA database in Antwerp (Belgium) offers extensive alignments of both small and large ribosomal subunit RNA (SSUILSU rRNA) sequences. In July 1996, the SSU rRNA and LSU rRNA sequence alignments comprised respectively about 6400 and 350 sequences. The alignments are based on the secondary structure models adopted for both molecules, which are corroborated by the observation of compensating mutations. Literature references, accession numbers, and detailed taxonomic information are also compiled. Since part of this issue of Systematic and Applied Microbiology is dedicated to the pseudomonads in particular, all SSU rRNA and LSU rRNA sequences determined for these bacteria and available in the Antwerp databases are listed. The complete databases are accessible to the scientific community through anonymous ftp and World Wide Web. Our server also provides software for sequence alignment and phylogenetic tree construction.
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