TABLE 2.

Functional categories of known and putative ORFs located on PAI I₅₃₆ to PAI IV₅₃₆

Known or putative function	No. of ORFs that are:
	Intact	Truncated	Nonfunctionala
Related to mobile genetic elements	14	33	3
Toxin	8
Adhesin	37	2
Iron acquisition	14	3
Other virulence-associated function	1	3
Enzymes	2	10
Regulation	3	5
Other functions	7	17	2
Hypothetical or unknownb	31	48	2
Without homology	4

^aDue to internal stop codons or frameshifts.

^bPutative ORFs or their encoded products show homology on the DNA or protein level.