| http://www.w3.org/ns/prov#value | - The H5 strain used for X-ray analysis was closely related to the virus that caused the 1997 Hong Kong outbreak, and the strain of the H9 subtype was a swine isolate, A/Swine/Hong Kong/9/98, that shared some important features, such as the structure of its receptor-binding site, with human H9 isolates (18).In our previous studies (10), we attempted to elucidate the detailed structure of antigenic s
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