Accession Numbers: <a href="http://www.ncbi.nlm.nih.gov/sites/entrez?db=nuccore&amp;cmd=Search&amp;term=NC_003421 or NC_003423:NC_003424[PACC]" class="external" onclick="window.open(this.href);return false;">NC_003421, NC_003423-NC_003424</a>