@article {12422,
	title = {Inhibition of the expression of penicillin resistance in Streptococcus pneumoniae by inactivation of cell wall muropeptide branching genes},
	journal = {Proc. Natl. Acad. Sci. USA},
	volume = {97},
	year = {2000},
	pages = {4891-4896},
	author = {S. R. Filipe and A. Tomasz}
}
