Fig. 5. Multiple sequence alignment, obtained via ClustalW [12], of 1166 bp nucleotide sequence of the hexon gene between the original fowl adenovirus (FAdV) isolate (UPM1137E2) and passaged FAdV isolates from passages 5 to 20 (E5–E20) in SPF CEE. The position of the L1 loop region is marked in shaded gray from nucleotide base 6 to base 601 with prominent nt substitutions in the E20 isolate.
