Usage examples (5)

• It soon became apparent that certain classes of bacteria (e.g. Rhizobiaceae) contained large plasmids called megaplasmids.
• Agrobacteria are members of the Rhizobiaceae family, which also includes the benign, nitrogen-fixing organisms Rhizobium and Sinorhizobium.
• The idea that large megaplasmids in Rhizobiaceae could become plasmids by acquiring essential genes has been around for three decades, at least.
• The Rhizobiaceae is an unusual bacterial family in that all of its members have either two chromosomes or one chromosome and very large plasmids.