Additional file 1: Table S1a. Percentage nucleotide sequence identity
in the HA genes of sub-lineage I viruses isolated since 2015.
Additional file 2: Table S1b. Percentage amino sequence identity in
the HA proteins of all sub-lineage I viruses.
Additional file 3: Table S1c. Amino acid between-group distances.
Additional file 4: Figure S1. Alignment of the hemagglutinin protein
sequences of South African H6N2 isolates from chickens.
Additional file 5: Table S2. Predicted glycosylation patterns in the
surface glycoproteins of H6N2 influenza viruses isolated since 2015.
Additional file 6: Figure S2. Alignment of the neuraminidase protein
sequences of South African H6N2 isolates from chickens.
Additional file 7: Figure S3. Alignment of the polymerase B2 (PB2)
protein sequences of South African H6N2 isolates from chickens.