FAdV-4 was adapted in chicken embryo liver (CEL) culture and
purified virus was used for DNA extraction using DNA isolation kit
(Bangalore Genie, India; Cat No. 107822) following manufacturer’s
instructions. PCR amplification of partial hexon gene of FAdV-4
was done using the primers designed for an immunodominant
coding sequence of hexon gene (737 bp) spanning 1792–2485 bp
from the total hexon gene sequence (2916 bp; Gene Bank Accession
No.AJ554049)using DNA star software (Laser gene), restriction
endonuclease sites (Pst1 and BamH1) were incorporated for directional
cloning.