Sequence alignment of C-terminus of HN gene of various NDV strains, the sequences of the current study, LaSota (JF950510), Ulster (M19478), R2B (JX316216) and previously characterized PAK strains Chicken/BYP/Lahore/2010 (JN682200). The C-terminus amino acids are colored green 

 Phylogenetic analysis of HN C-terminal sequences of NDV isolates. The class I and class II viruses are labeled with their predicted HN amino acids extensions. The sequences used in this study are labeled with red color.