id	author	title	date	pages	extension	mime	words	sentences	flesch	summary	cache	txt
cord-262274-oununr9g	He, Wei	Comprehensive codon usage analysis of porcine deltacoronavirus	2019-09-16		.txt	text/plain	4424	225	51	In this study, we analyzed the codon usage pattern of the S gene using complete coding sequences and complete PDCoV genomes to gain a deeper understanding of their genetic relationships and evolutionary history. When the actual ENC-plot values of these sequences are lower than the standard curve, it is suggestive of natural selection playing a role in driving codon usage bias (Fuglsang, 2008) . Overall, the above results indicate that the effect of mutation pressure is in all codon positions, but natural selection plays a major role driving the codon usage bias of PDCoV. We found that the A ≠ U, C ≠ G, for both the S gene and whole genomes, which indicates the inequivalent role of mutation pressure and natural selection in shaping the codon usage of PDCoV. Briefly, PDCoV has a low codon usage bias, which was affected by natural selection, mutation pressure, and dinucleotide abundancy.	./cache/cord-262274-oununr9g.txt	./txt/cord-262274-oununr9g.txt