無莢膜型肺炎球菌、莢膜変化
Unencapsulated Streptococcus pneumoniae from conjunctivitis encode variant traits and belong to a distinct phylogenetic cluster
http://www.nature.com/ncomms/2014/141112/ncomms6411/full/ncomms6411.html#genesandproteins
A random six-phase switch regulates
pneumococcal virulence via global
epigenetic changes
http://www.nature.com/ncomms/2014/140930/ncomms6055/full/ncomms6055.html