TABLE 1.
Pattern of variability in VP7 antigenic regions A, C, and F of Italian G1 strains of the different lineages in different years
| G1 straina | Year(s) | VR5 (region A, aa 87-101) | VR8 (region C, aa 208-221) | VR9 (region F, aa 233-242) |
|---|---|---|---|---|
| Ia | 1986, 1987, 1990, 1997 | TEASTGINDGEWKDS | QTTNVDSFETVAEN | NHKINLTTT |
| IIa | 1989, 1993, 1994 | --------------- | ---------M---- | --------- |
| V | 1989, 1990 | --------------- | ---------M---- | --------- |
| IIa-v1 | 1992 | N-------------- | ---------M---- | --------- |
| IIa-v2 | 1995, 1996 | ------------R-- | ---------M---- | --------- |
| IIb | 1994 | --------------- | ---------M---- | --------- |
| IId | 1995, 1998, 1999, 2000, 2002 | --------------- | ---------M---- | --Y------ |
| Ic | 1996, 1997, 2002 | -------S------- | -------------- | --------- |
| Ib | 2001 | A--V----------- | -------------- | V-------- |
| IId-v | 2002 | --------------- | ----I----M---- | --Y------ |
| IIc | 2003, 2004 | --------------- | ---------M---- | --------- |
| IIc-v | 2003 | --------------- | ---------MI--- | --------- |
| Ic-v | 2004 | -------S-----E- | -------------- | --------- |
| Wa | 1974 | ----------D---- | ---------MI--- | --------- |
a
The different G1 lineages are indicated by Roman numerals, sublineages are indicated by letters, and variants are indicated by the letter v with or without a subscript number.