Table 2. Nucleotide composition and skews of the Gnathostoma spinigerum mitochondrial protein-coding genes.

Gene	Proportion of nucleotides				A + T (%)	AT Skew	GC Skew
	A	T	G	C
cox1	20.6	46.4	23.4	9.7	67.0	−0.39	0.41
cox2	22.7	45.9	24.1	7.3	68.6	−0.34	0.54
cox3	19.8	50.9	21.2	8.1	70.7	−0.44	0.45
nad1	21.2	47.8	22.2	8.8	69.0	−0.39	0.43
nad2	25.0	51.0	17.6	6.4	76.0	−0.34	0.47
nad3	21.1	52.7	23.2	3.0	73.8	−0.43	0.77
nad4	20.2	51.2	21.1	7.5	71.4	−0.43	0.48
nad4L	15.8	57.0	22.4	4.8	72.8	−0.57	0.65
nad5	21.0	50.1	22.3	6.6	71.1	−0.41	0.54
nad6	15.3	57.1	22.4	5.3	72.4	−0.58	0.62
cytb	20.8	49.2	21.9	8.2	70.0	−0.41	0.46
atp6	25.9	44.7	22.1	7.3	70.6	−0.27	0.50