Scherer, S.

sequence strain variation genome influenzae protein number microbiol nucleotide species region length 1996. table element variability analysis motif study haemophilu polymorphism virulence typing amplification 1995. acids res science evolution phase belkum patient surface expression locus neisseria 1993. 1997. structure bacteriol change prokaryotic genome sequence aureus sputum domain identification 1994. plasmid staphylococcus aureus phase variation mutation function class haemophilus influenzae bacteria example factor mechanism van leeuwen microorganism nature probe disease 1992. presence replication tract novel marker gonorrhoeae reference antigenic variation fragment 100- nucleotide fragment tandem mycoplasma antigenic membrane candida primers