Protein-coding gene · mtDNA statistics

COX2

Cytochrome c oxidase subunit II. Length, base composition and strand skews in 2,335 species, by taxon and species by species.

COX2 in all species

Every parameter summarised over 2,335 species

COX2 in all species
Parameter	Species	Mean	SD	CV	Min	Median	Max	r	p
GC %(G + C) / (A + C + G + T)	2,335	42.19%	3.91	0.093	18.85%Bombus terrestris	42.69%	52.05%Campylorhynchus brunneicapillus	0.07	4.7 × 10⁻⁴
AT %(A + T) / (A + C + G + T)	2,335	57.81%	3.91	0.068	47.95%Campylorhynchus brunneicapillus	57.31%	81.15%Bombus terrestris	−0.07	4.7 × 10⁻⁴
A %A / (A + C + G + T)	2,335	30.62%	2.62	0.085	16.79%Placopecten magellanicus	30.41%	39.35%Anodonta anatina	0.20	2.6 × 10⁻²²
T %T / (A + C + G + T)	2,335	27.18%	3.09	0.114	20.18%Emberiza schoeniclus	27.18%	50.94%Strongyloides ratti	−0.26	1.7 × 10⁻³⁷
G %G / (A + C + G + T)	2,335	15.35%	2.05	0.133	7.66%Bombus terrestris	15.20%	32.41%Placopecten magellanicus	−0.16	2.0 × 10⁻¹⁴
C %C / (A + C + G + T)	2,335	26.84%	3.77	0.140	7.27%Corbicula japonica	27.05%	35.53%Parus major	0.16	6.1 × 10⁻¹⁵
GC skew(G − C) / (G + C) on the L strand	2,335	−0.269	0.105	–	−0.468Caiman crocodilus	−0.276	+0.533Corbicula fluminea	−0.21	3.8 × 10⁻²⁵
AT skew(A − T) / (A + T) on the L strand	2,335	+0.061	0.072	–	−0.438Strongyloides ratti	+0.058	+0.267Anodonta anatina	0.31	4.0 × 10⁻⁵³
Length (bp)Length in base pairs	2,335	690	34.6	0.050	666Anadara kagoshimensis	688	1,569Ruditapes philippinarum	−0.02	0.3

COX2 by class

GC content of COX2, % of A + C + G + T

Parameter

Chart

COX2 by class

ActinopterygiiRay-finned fishes	895	43.77%	2.09	0.048	36.61%Fundulus heteroclitus	43.85%	51.09%Diaphus theta	0.04	0.29
MammaliaMammals	627	39.39%	2.53	0.064	31.58%Proechimys brevicauda	39.33%	49.85%Macroderma gigas	0.33	2.4 × 10⁻¹⁷
AvesBirds	423	46.35%	1.84	0.040	41.81%Gallinago gallinago	46.20%	52.05%Campylorhynchus brunneicapillus	−0.08	0.12
ReptiliaReptiles	136	41.12%	3.31	0.081	34.50%Chelydra serpentina	40.98%	50.29%Gonatodes albogularis	−0.09	0.31
ChondrichthyesSharks and rays	87	38.16%	2.05	0.054	32.27%Bathyraja interrupta	38.35%	43.42%Isurus oxyrinchus	0.10	0.34
AmphibiaAmphibians	47	38.70%	3.43	0.089	31.88%Onychodactylus fischeri	39.10%	45.26%Pipa pipa	0.02	0.91
BivalviaBivalves	35	38.11%	4.20	0.110	31.09%Arctica islandica	38.10%	46.75%Cerastoderma edule	−0.30	0.08
MalacostracaCrustaceans	30	35.30%	2.26	0.064	31.69%Euphausia pacifica	35.40%	42.30%Panulirus argus	0.31	0.1
CephalopodaCephalopoda	11	31.73%	3.10	0.098	27.07%Amphioctopus fangsiao	32.47%	37.06%Ommastrephes bartramii	−0.01	0.98
CephalaspidomorphiLampreys	10	38.00%	0.81	0.021	37.10%Lampetra aepyptera	37.99%	39.62%Lethenteron camtschaticum	−0.21	0.57
GastropodaGastropoda	9	36.54%	3.26	0.089	32.46%Aplysia dactylomela	35.66%	41.81%Haliotis rufescens	0.75	0.02
InsectaInsects	4	23.10%	4.62	0.200	18.85%Bombus terrestris	22.80%	27.95%Ceratitis capitata	–	–
SarcopterygiiLobe-finned fishes	4	40.74%	2.29	0.056	37.48%Lepidosiren paradoxa	41.32%	42.84%Neoceratodus forsteri	–	–
EchinoideaSea urchins	4	42.83%	0.45	0.011	42.32%Mesocentrotus franciscanus	42.83%	43.33%Strongylocentrotus droebachiensis	–	–
PolychaetaPolychaeta	4	36.90%	1.45	0.039	34.93%Terebellides stroemii	37.11%	38.43%Seepiophila jonesi	–	–

Every species

Base counts on the L strand as deposited in RefSeq. Download all 2,335 rows as CSV

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More about this region

COX2 gene page COX2 in the taxa table Plot its GC content against lifespan