family · mtDNA statistics

Pythonidae

3 species in 2 genera. Every region of their mitochondrial genomes, side by side.

Group

species

41.5%

mean GC, whole genome

SD 1.1, range 40.2–42.2%

17,258

median genome length, bp

Range 17,245–17,641 bp

genera

Regions

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

Parameter

Chart

GC % of every region
Region
Whole genome	3	41.46%	1.06	0.025	40.25%Malayopython reticulatus	41.94%	42.19%Python molurus	–	–
Protein-coding	3	41.82%	1.05	0.025	40.63%Malayopython reticulatus	42.24%	42.61%Python molurus	–	–
All rRNA	3	41.74%	0.58	0.014	41.07%Malayopython reticulatus	42.06%	42.10%Python regius	–	–
All tRNA	3	41.71%	0.13	0.003	41.57%Malayopython reticulatus	41.71%	41.84%Python regius	–	–
12S rRNA	3	45.02%	0.21	0.005	44.78%Malayopython reticulatus	45.14%	45.14%Python molurus	–	–
16S rRNA	3	39.71%	0.81	0.020	38.77%Malayopython reticulatus	40.15%	40.21%Python regius	–	–
D-loop	3	39.92%	0.89	0.022	38.90%Malayopython reticulatus	40.30%	40.56%Python molurus	–	–
ND1	3	41.56%	1.37	0.033	40.02%Malayopython reticulatus	42.01%	42.63%Python regius	–	–
ND2	3	41.51%	0.20	0.005	41.28%Python regius	41.57%	41.67%Python molurus	–	–
COX1	3	42.90%	1.37	0.032	41.32%Malayopython reticulatus	43.70%	43.70%Python molurus	–	–
COX2	3	45.20%	1.16	0.026	43.88%Malayopython reticulatus	45.72%	46.01%Python molurus	–	–
ATP8	3	36.30%	1.21	0.033	35.09%Malayopython reticulatus	36.31%	37.50%Python molurus	–	–
ATP6	3	39.89%	1.04	0.026	38.77%Malayopython reticulatus	40.09%	40.82%Python regius	–	–
COX3	3	45.62%	1.34	0.029	44.26%Malayopython reticulatus	45.66%	46.94%Python molurus	–	–
ND3	3	40.43%	1.71	0.042	38.48%Malayopython reticulatus	41.11%	41.69%Python regius	–	–
ND4L	3	37.50%	1.31	0.035	36.21%Python regius	37.46%	38.83%Python molurus	–	–
ND4	3	42.55%	1.77	0.042	40.56%Malayopython reticulatus	43.14%	43.95%Python molurus	–	–
ND5	3	39.69%	0.99	0.025	38.63%Malayopython reticulatus	39.86%	40.58%Python molurus	–	–
ND6	3	39.12%	0.30	0.008	38.79%Python molurus	39.18%	39.38%Python regius	–	–
CYTB	3	43.20%	1.16	0.027	41.92%Malayopython reticulatus	43.47%	44.19%Python molurus	–	–

Genera of Pythonidae

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

Region

Parameter

Chart

Genera of Pythonidae

Python	2	42.06%	0.18	0.004	41.94%Python regius	42.06%	42.19%Python molurus	–	–
Malayopython	1	40.25%	–	–	40.25%Malayopython reticulatus	40.25%	40.25%Malayopython reticulatus	–	–

Codon usage

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

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

Pythonidae taxon page 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.