Table 3. Nucleotide composition of the Nemopoda mamaevi mt genome.

Feature	A%	T%	C%	G%	A+T%	C+G%	AT-skew	GC-skew
Whole mitgenome	38.0	36.8	15.2	10.0	74.8	25.2	0.16	-0.21
PCGs	30.4	42.3	13.5	13.8	72.7	27.3	-0.16	0.01
1st codon position	30.8	36.0	12.7	20.5	66.8	33.2	-0.08	0.23
2nd codon position	20.4	46.0	19.5	14.2	66.4	33.7	-0.39	-0.16
3rd codon position	40.1	45.0	8.3	6.7	85.1	15.0	-0.06	-0.11
tRNA genes	38.2	37.9	10.7	13.2	76.1	23.9	0.00	0.10
lrRNA	39.1	41.5	6.4	12.9	80.6	19.3	-0.03	0.34
srRNA	37.9	39.7	7.8	14.6	77.6	22.4	-0.02	0.30
Control region	44.5	41.9	9.1	4.5	86.4	13.6	0.03	-0.05

Note: The A+T and G+C biases of protein-coding genes were calculated by AT-skew = [A-T]/[A+T] and GC-skew = [G-C]/[G+C], respectively.