Schematic diagram of plasmid pBM300. ORFs are indicated by both open and shaded arrows. PstI, EcoRI, and BamHI enzyme sites are indicated for reference. Dark grey arrows, ORF encoding RepM; medium grey arrows, ORFs encoding predicted proteins with similarity to proteins having known functions; light grey arrows, ORFs encoding predicted proteins with similarity to proteins having unknown functions; open arrows, ORFs encoding proteins with no similarity.