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Xerostomia may develop in patients with cancer who receive radiotherapy that includes the salivary glands in the field. These patients are at high risk of rampant dental caries. Streptococcus mutans and Lactobacillus species have been associated with dental caries. Quantitative counts of these organisms demonstrated high caries risk due to streptococci in… (More)
A site-specific restriction endonuclease Fnu4H I isolated from Fusobacterium nucleatum 4H recognizes the DNA nucleotide sequence 5'G C N G C-3'/3'-C G N C G-5' and cleaves as indicated by the arrows.