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. 2019 Dec 18;15:455. doi: 10.1186/s12917-019-2210-4

Fig. 6.

Fig. 6

Maximum likelihood phylogenetic tree of segment 3 encoding the polymerase A (PA) and PA-X proteins of South African H6N2 chicken and reference viruses. Green = Gauteng Province; Blue = North West Province; Red = KwaZulu-Natal Province; clear = reference strains. Viruses sequenced in the present study are in boldface. Genetic clusters are labelled A and B and