id	author	title	date	pages	extension	mime	words	sentences	flesch	summary	cache	txt
cord-355512-tycuoslv	Storz, J.	Comparison of hemagglutinating, receptor-destroying, and acetylesterase activities of avirulent and virulent bovine coronavirus strains	1992		.txt	text/plain	3246	172	57	Hemagglutinating and acetylesterase functions as well as the 124 kDa glycoprotein were present in the highly cell-culture adapted, avirulent bovine coronavirus strain BCV-L9, in the Norden vaccine strain derived from it, and in 5 wild-type, virulent strains that multiplied in HRT-18 cells but were restricted in several types of cultured bovine cells. Purified preparations of the vaccine and the wild-type strains agglutinated chicken erythrocytes at low titers and mouse erythrocytes at 128 to 256 times higher titers whereas receptor destroying enzyme activity was detectable only with chicken erythrocytes. When wild-type strains were propagated in HRT cells at low passage levels, they produced 5×10(5) to 4.5×10(6) plaque forming units per 50 µl which agglutinated erythrocytes from mice but not from chickens. The objective of our investigations was to identify the HE of wild-type BCV strains at low passage levels in H R T cell cultures and to compare it with the HE of prototype BCV-L9 and vaccine strains by relating its functions to the interaction with different erythrocytes, the effects of enzyme inhibitors, and to plaque-forming infectivity.	./cache/cord-355512-tycuoslv.txt	./txt/cord-355512-tycuoslv.txt