Distinguishing features of a pathogenicity island include all of the following EXCEPT:

Distinguishing features of a pathogenicity island include all of the following EXCEPT: 



a. genes are not expressed as operons
b. GC/AT ratio differs from the rest genome
c. residual phage genomes flank the island
d. they are often linked to tRNA
e. encode the sec III protein export systems


Answer: genes are not expressed as operons


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