TABLE 5.

Polymorphism within and divergence between fliC domains for H7 and H6 flagellar antigens

Domain	No. of codons	Mean ± SE polymorphism within domain		pN/pS ratio	Mean ± SE divergence between domains		pN/pS ratio
		pS (102)	pN (102)		pS (102)	pN (102)
N terminus	153	4.60 ± 0.87	0.52 ± 0.18	0.12 ± 0.05	21.70 ± 3.69	0.49 ± 0.32	0.02 ± 0.01
Central region	240	1.13 ± 0.33	0.61 ± 0.18	0.57 ± 0.27	69.57 ± 3.43	64.33 ± 2.14	0.93 ± 0.05
C terminus	68	2.69 ± 1.03	0.44 ± 0.25	0.17 ± 0.13	24.07 ± 5.23	2.55 ± 1.76	0.11 ± 0.08