id	author	title	date	pages	extension	mime	words	sentences	flesch	summary	cache	txt
cord-254932-b447w202	Panda, Aruna	Role of fusion protein cleavage site in the virulence of Newcastle disease virus	2003-11-18		.txt	text/plain	5550	259	53	The genetic stability of the mutations introduced into the genome of LaSota V.F. virus was determined by sequence analysis of the RT-PCR fragment that covered the region of the F protein cleavage site of the mutant virus that was passed five times in 9-day-old chicken embryos, and also from the mutant virus that was passaged once in chicken brains. These results demonstrated that the efficiency of cleavage of the F protein plays an important role if the NDV is delivered directly into the brains of chicks, but there could be other viral factors that probably affect peripheral replication, viremia, or entry into the central nervous system. These results demonstrated that the efficiency of cleavage of the F protein plays an important role if the NDV is delivered directly into the brains of chicks, but there could be other viral factors that probably affect peripheral replication, viremia, or entry into the central nervous system.	./cache/cord-254932-b447w202.txt	./txt/cord-254932-b447w202.txt