id	author	title	date	pages	extension	mime	words	sentences	flesch	summary	cache	txt
cord-340905-8nyew5i5	Chen, Yi-Ning	Genotyping of turkey coronavirus field isolates from various geographic locations in the Unites States based on the spike gene	2015-08-08		.txt	text/plain	3189	152	53	The objective of the present study was to elucidate the relationship between the genotypes and geographic distribution of TCoV isolates from turkey farms in multiple states in the United States by using sequence analysis and comparing the full-length S gene. Three genetic groups, referred to as groups I, II, and III, were observed in North American TCoV isolates ( Fig. 2A) Because of the high degree of variation, most phylogenetic groupings based on the S1a deduced amino acid sequences did not have a bootstrap value over 50 % (Fig. 2B) . Nevertheless, the Texas TCoV isolates of group II and all three TCoV isolates of group III shown in the phylogenetic tree based on the full-length S nucleotide sequences still clustered according to their S1a amino acid sequences containing their HVR. In the present study, similar to previous findings with IBV strains, most of the variations in the S protein sequences among TCoV isolates were observed in the amino-terminal half.	./cache/cord-340905-8nyew5i5.txt	./txt/cord-340905-8nyew5i5.txt