Protein-coding gene · mtDNA statistics

CYTB

Cytochrome b. Length, base composition and strand skews in 2,334 species, by taxon and species by species.

CYTB in all species

Every parameter summarised over 2,334 species

CYTB in all species
Parameter	Species	Mean	SD	CV	Min	Median	Max	r	p
GC %(G + C) / (A + C + G + T)	2,334	44.08%	3.92	0.089	18.37%Bombus terrestris	44.61%	53.28%Phaethon lepturus	0.13	1.4 × 10⁻⁹
AT %(A + T) / (A + C + G + T)	2,334	55.92%	3.92	0.070	46.72%Phaethon lepturus	55.39%	81.63%Bombus terrestris	−0.13	1.4 × 10⁻⁹
A %A / (A + C + G + T)	2,334	27.58%	3.13	0.114	16.67%Placopecten magellanicus	27.89%	48.33%Architeuthis dux	0.16	3.1 × 10⁻¹⁵
T %T / (A + C + G + T)	2,334	28.34%	3.43	0.121	20.18%Thysanoteuthis rhombus	27.96%	57.16%Strongyloides ratti	−0.29	1.0 × 10⁻⁴⁶
G %G / (A + C + G + T)	2,334	14.09%	2.17	0.154	7.09%Bombus terrestris	13.65%	32.69%Pseudocaranx dentex	−0.23	3.8 × 10⁻³⁰
C %C / (A + C + G + T)	2,334	29.99%	4.02	0.134	7.79%Strongyloides ratti	30.32%	38.41%Phaethon lepturus	0.25	5.5 × 10⁻³⁴
GC skew(G − C) / (G + C) on the L strand	2,334	−0.357	0.111	–	−0.527Lachesis muta	−0.369	+0.386Strongyloides ratti	−0.30	1.9 × 10⁻⁴⁸
AT skew(A − T) / (A + T) on the L strand	2,334	−0.013	0.091	–	−0.532Strongyloides ratti	−0.003	+0.399Architeuthis dux	0.30	8.0 × 10⁻⁴⁹
Length (bp)Length in base pairs	2,334	1,142	20.1	0.018	1,079Crotalus horridus	1,141	1,920Branta bernicla	−0.01	0.67

CYTB by class

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

Parameter

Chart

CYTB by class

ActinopterygiiRay-finned fishes	895	45.81%	2.56	0.056	36.20%Erpetoichthys calabaricus	46.01%	51.80%Dissostichus eleginoides	0.03	0.43
MammaliaMammals	627	42.30%	2.37	0.056	34.04%Hemiechinus auritus	42.37%	50.00%Desmodus rotundus	0.42	6.1 × 10⁻²⁸
AvesBirds	422	47.23%	1.73	0.037	43.04%Onychoprion fuscatus	47.07%	53.28%Phaethon lepturus	0.11	0.03
ReptiliaReptiles	136	42.36%	2.61	0.062	35.46%Bungarus fasciatus	42.29%	50.48%Paleosuchus trigonatus	0.26	0.002
ChondrichthyesSharks and rays	87	40.67%	2.92	0.072	33.07%Bathyraja taranetzi	40.61%	45.93%Okamejei kenojei	−0.02	0.87
AmphibiaAmphibians	47	39.98%	4.34	0.108	31.99%Onychodactylus fischeri	40.89%	47.86%Pelophylax nigromaculatus	0.00	0.99
BivalviaBivalves	35	36.88%	3.76	0.102	29.81%Corbicula fluminea	36.94%	44.00%Mimachlamys varia	−0.21	0.24
MalacostracaCrustaceans	30	35.81%	2.55	0.071	30.69%Euphausia pacifica	35.82%	41.23%Panulirus argus	0.00	1
CephalopodaCephalopoda	11	30.82%	4.10	0.133	24.91%Amphioctopus fangsiao	30.35%	38.58%Ommastrephes bartramii	−0.14	0.67
CephalaspidomorphiLampreys	10	37.24%	0.92	0.025	35.35%Petromyzon marinus	37.24%	38.79%Lampetra aepyptera	0.10	0.78
GastropodaGastropoda	9	35.84%	2.36	0.066	33.39%Aplysia dactylomela	35.18%	40.09%Haliotis tuberculata	0.74	0.02
InsectaInsects	4	22.58%	4.32	0.191	18.37%Bombus terrestris	22.65%	26.65%Ceratitis capitata	–	–
SarcopterygiiLobe-finned fishes	4	41.92%	2.66	0.064	37.98%Lepidosiren paradoxa	43.01%	43.70%Latimeria chalumnae	–	–
EchinoideaSea urchins	4	42.06%	0.86	0.020	41.38%Strongylocentrotus droebachiensis	41.84%	43.17%Strongylocentrotus purpuratus	–	–
PolychaetaPolychaeta	4	37.07%	2.13	0.058	34.36%Terebellides stroemii	37.16%	39.58%Nereis pelagica	–	–

Every species

Base counts on the L strand as deposited in RefSeq. Download all 2,334 rows as CSV

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More about this region

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