The two cobalamin biosynthesis clusters on pSZ77 situated on either side of the TonB-encoding transport cluster may thus provide strains SZ and KB-1 with a mechanism for simultaneous regulation of both cobalamin biosynthesis and scavenging for extracellular corrinoids.
In conclusion, sequence analysis of pMR68 showed that the plasmid contains novel genes that may provide Pseudomonas strains with the means to adapt to a wide variety of challenging environments, including exposure to heavy metals.
These regions most likely represent DNA that was acquired during events of HGT that may provide the strains with greater metabolic versatility or even virulence capabilities, as will be further discussed in the plasticity section.
Previous infection by a distinct strain may provide partial immunity against a new strain [16] [18], provided that the antigenic distance between the two strains is not too high.
Specifically, the 112 bp deletion on PPE41 gene that, found among Lisboa3 strains, may provide a selective advantage for these strains.
A complete sequenced genome of Huangjiu strain may provide a better understanding of the genetic basis of the strain for adaptation to specific fermentation environments.
Since the myo1Δ transcriptional fingerprint is a subset of the CWIP fingerprint, the myo1Δ strain may provide a simplified paradigm for cell wall stress survival.
The non-meiotic exchange of genetic information [ 5] between the major lineages may have occurred only twice in the entire history of the species [ 6, 7], although more regular exchange among close relatives may provide a unique form of intra-strain copy correction [ 7- 10].
Pathogens that come in multiple strains, such as the influenza virus or HIV, are the bane of vaccine developers: A vaccine effective against one strain may provide little immunity to others.
