FIG. 1.

Alignment of partial omp2 nucleotide sequences from all nine species of Chlamydiaceae. Primer and probe sequences and AluI restriction sites (motif AGCT) are highlighted. Dashes represent areas of predicted DNA deletions. (Initial alignment produced by submission to the ClustalW programme on the European Bioinformatics Institute website.) Additional sequences available: C. trachomatis, eight sequences (GenBank loci CTOMP2, CHTOMPE, CHTOMPA, CHTCRPA, CTSL3CRP, CTSCCRP, CHTOMP2A, and AE001317); C. pneumoniae, 10 sequences (8 in reference 7, and genomes of AR39 and CW1029 in Genbank); C. psittaci, 2 sequences (Genbank CPSCROMP and reference 14); C. abortus, 1 sequence (14); C. pecorum, 4 partial sequences (U56927, AF111199, and reference 14). All additional sequences show 98.5 to 100% homology with the sequence shown above, with no alterations in restriction sites; however, the 3′ primer-binding site of C. pecorum strain VR268 (accession no. U56927) is altered at the first 3 bases (TGG to GCC).