Article metrics loading... /content/journal/mgen/10.1099/mgen.0.001320 Download as PowerPoint /deliver/fulltext/mgen/10/11/mgen001320.html?itemId=/content/journal/mgen/10.1099/mgen.0.001320&mimeType=html&fmt=ahah References Ipoutcha T, Tsarmpopoulos I, Géraldine G, Vincent B, Paul D et al. Evolution of the CRISPR-cas9 defence system in mycoplasma gallisepticum following colonization of a novel bird host.