<page_title> Genome </page_title> <section_title> Genome size </section_title> <table> <cell> Phage Φ-X174 <col_header> Organism </col_header> </cell> <cell> 5,386 <col_header> Genome size (base pairs) </col_header> </cell> <cell> First sequenced DNA-genome <col_header> Note </col_header> </cell> </table>
The first DNA-genome was Phage Φ-X174, which has 5386 base pairs.