Genes which confer invasiveness to a pathogen and whose GC content varies significantly from that of the totla genome constitute;

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Pathogenicity islands are clusters of genes in the genome of pathogenic bacteria which are acquired through horizontal gene transfer and are responsible for virulence and invasiveness. These regions often have different GC content than the rest of the genome and can be used to distinguish pathogenic strains from non-pathogenic ones.

Genes Which Confer Invasiveness to a Pathogen and Whose GC