Table 3. Sequences subject to phase variation in one or more of the isolates.

	gene	Z2491	Frame	Z5463	Frame	Z5463PI	Frame	Z5463BC	Frame	References
NMA0048	pglA	(G)14	in	(G)11	in	(G)9	out	(G)10	out	[24]–[27]
NMA0132	hypothetical	(C)9	pro	(C)9	pro	(C)9	pro	(C)8	pro	[24], [25]
NMA0277	hypothetical	(A)11	pro	(A)9	pro	(A)10	pro	(A)10	pro	[24], [27]
NMA0285/86	hydrolase	(C)7	out	(C)8	in	(C)8	in	(C)8	in	[24]
NMA0293	pilC2	(G)11	out	(G)10	out	(G)10	out	NUS	-	[24]–[26]
NMA0407	acetyltransferase	(G)12	out	(G)10	in	(G)10	in	(G)9	out	[24], [25]
NMA0475	hpuA	(G)10	in	(G)9	out	(G)9	out	(G)7	in	[24], [25]
NMA0478	nalP	(C)10	in	(C)9	out	(C)9	out	(C)10	in	[24]–[27]
NMA0609	pilC1	(G)13	in	(G)10	in	(G)10	in	NUS	-	[24], [25], [27]
NMA0619	wbpC	(G)10	in	(G)11	out	(G)11	out	(G)9	out	[24], [25], [27]
NMA0641	conserved hypothetical	CACTCCCT(C)16	out	CACTCCCT(C)9	in	CACTCCCT(C)9	in	CACTCCCT(C)9	in	[24], [25]
NMA0782	phage associated	(C)7(N)10(G)7	in	(C)6(N)10(G)7	out	(C)6(N)10(G)7	out	(C)6(N)10(G)7	out	[24], [27]
NMA0832	glycosyltransferase	(CAAACAA)26(AT)3CTAT	in	(CAAACAA)14(AT)3CTAT	in	(CAAACAA)14(AT)3CTAT	in	(CAAACAA)14(AT)3CTAT	in	[24]
NMA1090	conserved hypothetical	(C)6	in	(C)6	in	(C)6	in	(C)7	out	[24]
NMA1251	opcA	(C)17	pro	(C)9	pro	(C)9	pro	(C)9	pro	[24], [25], [27]
NMA1385	hsdM	(A)8	dead	(A)8	dead	(A)9	dead	(A)8	dead	[24], [27]
NMA1427	glycosyltransferase	(G)9	out	(G)9	out	(G)9	out	(G)10	in	[24], [25]
NMA1642	porA	(G)12	pro	(G)12	pro	(G)11	pro	(G)11	pro	[24], [25], [27]
NMA1792	phage associated	(C)10(N)10(G)7	pro	(C)8(N)10(G)7	pro	(C)8(N)10(G)7	pro	(C)8(N)10(G)7	pro	[24], [25], [27]
NMA1925	hmbR	(G)10	out	(G)11	in	(G)11	in	(G)9	out	[24]–[27]
NMA2043	opaA	(CTTCT)11	out	(CTTCT)10	out	(CTTCT)10	out	NUS	-	[24], [25]

out: non functional protein;

in: functional protein;

pro: phase variation in the promoter region;

dead: stop codon in the three reading frames.

NUS: No Unique Sequence.