TABLE 3.

Potential glycosylation sites on HA proteins of parakeet and closely related H9N2 viruses

Virus	Glycosylation sitea at position:
	11	87	123	188	200	280	287	474
A/parakeet/Chiba/1/97	+	+	+	−	+	+	+	+
A/parakeet/Narita/92A/98	+	+	+	−	−	+	+	+
A/quail/Hong Kong/G1/97	+	+	+	+	+	+	+	+
A/Hong Kong/1073/99	+	+	+	+	+	+	+	+
A/Hong Kong/1074/99	+	+	+	+	+	+	+	+
A/chicken/Beijing/1/94	+	−	+	−	+	+	+	+
A/chicken/Hong Kong/739/94	+	−	+	−	+	+	+	+
A/chicken/Hong Kong/G9/97	+	−	+	−	+	+	+	+
A/duck/Hong Kong/Y439/97	+	−	+	−	+	+	+	+
A/quail/Hong Kong/AF157/93	+	−	+	−	+	+	+	+
A/turkey/California/189/66	+	−	+	−	+	+	+	+
A/turkey/Minnesota/1/95	+	−	+	−	+	+	+	+

^a+, glycosylation site present; −, glycosylation site absent.