class · mtDNA statistics

Mammalia

Mammals: 627 species in 25 orders. Every region of their mitochondrial genomes, side by side.

Group

627

species

39.5%

mean GC, whole genome

SD 2.2, range 30.9–48.2%

16,552

median genome length, bp

Range 15,289–17,755 bp

orders

Regions

GC content of each region across Mammalia, % of A + C + G + T

Parameter

Chart

GC % of every region
Region
Whole genome	627	39.52%	2.21	0.056	30.90%Hemiechinus auritus	39.47%	48.24%Macroderma gigas	0.48	7.5 × 10⁻³⁷
Protein-coding	627	39.84%	2.38	0.060	30.53%Hemiechinus auritus	39.94%	49.09%Macroderma gigas	0.44	1.1 × 10⁻³⁰
All rRNA	627	39.49%	1.91	0.048	33.82%Hemiechinus auritus	39.55%	47.85%Desmodus rotundus	0.49	1.9 × 10⁻³⁹
All tRNA	627	36.56%	1.51	0.041	32.22%Didelphis virginiana	36.38%	42.64%Desmodus rotundus	0.45	3.2 × 10⁻³³
12S rRNA	627	41.20%	2.03	0.049	35.22%Apodemus peninsulae	41.24%	50.73%Desmodus rotundus	0.55	8.7 × 10⁻⁵²
16S rRNA	627	38.45%	2.00	0.052	32.66%Hemiechinus auritus	38.49%	46.33%Macroderma gigas	0.41	6.4 × 10⁻²⁷
D-loop	553	40.12%	4.65	0.116	0.00%Tragulus napu	40.53%	50.39%Bassaricyon gabbii	0.37	1.1 × 10⁻¹⁹
ND1	627	40.89%	2.67	0.065	30.61%Hemiechinus auritus	41.07%	49.95%Desmodus rotundus	0.41	1.1 × 10⁻²⁶
ND2	627	37.16%	2.76	0.074	25.77%Hemiechinus auritus	37.04%	45.59%Desmodus rotundus	0.37	1.0 × 10⁻²¹
COX1	627	41.32%	2.24	0.054	35.60%Suncus murinus	41.31%	49.06%Desmodus rotundus	0.36	1.4 × 10⁻²⁰
COX2	627	39.39%	2.53	0.064	31.58%Proechimys brevicauda	39.33%	49.85%Macroderma gigas	0.33	2.4 × 10⁻¹⁷
ATP8	627	33.51%	3.59	0.107	23.53%Hemiechinus auritus	33.33%	46.38%Pongo pygmaeus	0.27	1.2 × 10⁻¹¹
ATP6	627	39.40%	2.64	0.067	29.22%Hemiechinus auritus	39.35%	50.37%Macroderma gigas	0.35	5.4 × 10⁻²⁰
COX3	627	43.04%	2.43	0.056	35.46%Erinaceus concolor	43.24%	52.93%Macroderma gigas	0.41	7.0 × 10⁻²⁷
ND3	627	39.52%	3.17	0.080	29.77%Pipistrellus pipistrellus	39.88%	48.55%Macroderma gigas	0.35	3.1 × 10⁻¹⁹
ND4L	627	37.83%	3.19	0.084	25.93%Hemiechinus auritus	37.71%	49.49%Macroderma gigas	0.31	2.5 × 10⁻¹⁵
ND4	627	38.94%	2.69	0.069	26.49%Hemiechinus auritus	39.11%	48.69%Macroderma gigas	0.46	1.7 × 10⁻³⁴
ND5	627	39.11%	2.66	0.068	29.09%Hemiechinus auritus	39.32%	50.14%Macroderma gigas	0.47	9.4 × 10⁻³⁶
ND6	627	37.74%	2.68	0.071	29.40%Hemiechinus auritus	37.69%	50.95%Desmodus rotundus	0.34	6.1 × 10⁻¹⁹
CYTB	627	42.30%	2.37	0.056	34.04%Hemiechinus auritus	42.37%	50.00%Desmodus rotundus	0.42	6.1 × 10⁻²⁸

Orders of Mammalia

GC content of the whole genome, % of A + C + G + T

Region

Parameter

Chart

Orders of Mammalia

Artiodactyla	135	39.25%	1.34	0.034	35.53%Ozotoceros bezoarticus	39.26%	43.06%Physeter macrocephalus	0.41	6.6 × 10⁻⁷
Carnivora	124	40.43%	1.43	0.035	35.80%Paradoxurus hermaphroditus	40.57%	43.56%Cryptoprocta ferox	0.33	2.0 × 10⁻⁴
Primates	116	40.57%	2.19	0.054	36.31%Microcebus murinus	40.19%	45.68%Hylobates agilis	0.48	5.0 × 10⁻⁸
Rodentia	87	37.89%	1.87	0.049	34.56%Muscardinus avellanarius	37.54%	41.68%Castor canadensis	0.18	0.09
Chiroptera	45	39.61%	3.05	0.077	33.99%Lasionycteris noctivagans	39.64%	48.24%Macroderma gigas	0.06	0.67
Cetacea	29	40.01%	1.10	0.028	38.52%Mesoplodon europaeus	40.18%	43.23%Kogia breviceps	0.03	0.88
Diprotodontia	12	38.61%	1.11	0.029	36.61%Petaurus breviceps	39.13%	39.61%Vombatus ursinus	0.08	0.81
Perissodactyla	12	41.15%	1.21	0.029	37.78%Tapirus terrestris	41.62%	42.09%Equus asinus	−0.17	0.61
Cingulata	8	40.51%	1.72	0.042	38.86%Dasypus novemcinctus	40.20%	44.44%Priodontes maximus	−0.19	0.65
Dasyuromorphia	7	37.85%	1.14	0.030	36.29%Dasyurus hallucatus	37.37%	39.39%Phascogale tapoatafa	0.09	0.85
Didelphimorphia	7	34.71%	1.83	0.053	33.18%Didelphis virginiana	34.38%	38.55%Gracilinanus agilis	0.26	0.58
Eulipotyphla	6	36.81%	2.65	0.072	32.66%Erinaceus concolor	37.04%	39.44%Blarina brevicauda	−0.77	0.07
Lagomorpha	5	40.62%	2.09	0.051	38.56%Lepus timidus	40.21%	42.95%Ochotona princeps	−0.81	0.1
Macroscelidea	5	40.32%	2.25	0.056	37.44%Rhynchocyon chrysopygus	40.94%	43.20%Elephantulus intufi	−0.50	0.39
Pilosa	5	40.67%	2.24	0.055	38.94%Tamandua mexicana	39.10%	43.26%Choloepus didactylus	0.81	0.09

Codon usage

Share of each codon in all 13 protein-coding genes, across Mammalia

Gene

Loading codon usage…

Every species, region by region

Each region's page lists the value of every species, with the same statistics by class, order or family and a CSV download.

Whole genome Protein-coding All rRNA All tRNA 12S rRNA 16S rRNA D-loop ND1 ND2 COX1 COX2 ATP8 ATP6 COX3 ND3 ND4L ND4 ND5 ND6 CYTB

Mammalia taxon page Plot GC content against GC skew All data downloads

The charts

Each chart draws the rows of the table under it, in the table's order: sort a column to reorder the chart.Chart sets its axis.
Distribution: the range (line), mean ± SD (bar), median (tick) and mean (dot). Lengths of the regions are on a log scale.
Variation: the coefficient of variation, or the SD for the skews, which vary around zero.
Lifespan r: r with its 95% confidence interval (Fisher z). Lifespan map: r of every parameter in every region at once, bold where the Benjamini–Hochberg q-value over the map is below 0.05.

What the numbers are

Species: species with the region annotated. SD is the sample standard deviation, CV = SD / mean.
Base percentages are over A + C + G + T, so GC % + AT % = 100. Skews are on the L strand as deposited in RefSeq: GC skew = (G − C) / (G + C), AT skew = (A − T) / (A + T).
Min and Max name the species with the extreme value.

Lifespan columns

r is the Pearson correlation of the parameter with log₁₀ maximum lifespan within the group (5 or more species), and p its two-tailed p-value, as on the original MitoAge. They are not corrected for multiple testing or for shared ancestry: the plot shows Benjamini–Hochberg q-values and phylogenetic contrasts.

The original site labelled the base columns with their complements, so its skews have the opposite sign. Seemethods.