TABLE 2.

Generation of A/Hong Kong/486/97 (H5N1) mutant viruses

VirusHA glycosylation site at aa:NA stalk
131158169LongbShort
486-none-L+
486-131-L++
486-158-L++
486-169-L++
486-131/169-L+++
486-158/169-L+++
486-131/158/169-L++++
486-none-S+
486-131-S++
486-158-S++
486-169-Sa++
486-131/169-S+++
486-158/169-S+++
486-131/158/169-S++++
  • a 486-169-S represents the wt A/Hong Kong/486/97 (H5N1) virus.

  • b Long NA stalk contains a 19-aa insertion in the stalk of the NA.