rRNA gene · mtDNA statistics

16S rRNA

16S ribosomal RNA. Length, base composition and strand skews in 2,332 species, by taxon and species by species.

16S rRNA in all species

Every parameter summarised over 2,332 species

16S rRNA in all species
Parameter	Species	Mean	SD	CV	Min	Median	Max	r	p
GC %(G + C) / (A + C + G + T)	2,332	41.98%	4.78	0.114	15.04%Bombus terrestris	43.43%	51.58%Agapornis pullarius	0.06	0.003
AT %(A + T) / (A + C + G + T)	2,332	58.02%	4.78	0.082	48.42%Agapornis pullarius	56.57%	84.96%Bombus terrestris	−0.06	0.003
A %A / (A + C + G + T)	2,332	35.06%	2.44	0.070	19.68%Pseudoscaphirhynchus hermanni	34.76%	44.84%Amphioctopus fangsiao	0.14	5.1 × 10⁻¹¹
T %T / (A + C + G + T)	2,332	22.96%	3.52	0.153	15.55%Megalops cyprinoides	21.94%	50.64%Strongyloides ratti	−0.18	7.8 × 10⁻¹⁸
G %G / (A + C + G + T)	2,332	18.71%	2.44	0.130	4.77%Bombus terrestris	18.65%	28.33%Placopecten magellanicus	−0.05	0.02
C %C / (A + C + G + T)	2,332	23.27%	3.17	0.136	7.15%Macrostomum lignano	23.76%	32.94%Gonatodes albogularis	0.13	2.8 × 10⁻¹⁰
GC skew(G − C) / (G + C) on the L strand	2,332	−0.108	0.079	–	−0.464Architeuthis dux	−0.103	+0.398Ostrea edulis	−0.12	6.1 × 10⁻⁹
AT skew(A − T) / (A + T) on the L strand	2,332	+0.211	0.066	–	−0.279Strongyloides ratti	+0.219	+0.414Megalops cyprinoides	0.23	5.3 × 10⁻²⁹
Length (bp)Length in base pairs	2,332	1,618	341.9	0.211	575Ostrea edulis	1,600	17,202Crocidura russula	−0.02	0.31

16S rRNA by class

GC content of 16S rRNA, % of A + C + G + T

Parameter

Chart

16S rRNA by class

ActinopterygiiRay-finned fishes	893	45.38%	1.92	0.042	36.71%Nothobranchius kuhntae	45.64%	50.92%Tenualosa toli	0.07	0.04
MammaliaMammals	627	38.45%	2.00	0.052	32.66%Hemiechinus auritus	38.49%	46.33%Macroderma gigas	0.41	6.4 × 10⁻²⁷
AvesBirds	423	45.06%	1.77	0.039	41.17%Gallinago delicata	44.82%	51.58%Agapornis pullarius	0.30	5.1 × 10⁻¹⁰
ReptiliaReptiles	135	40.62%	2.62	0.065	35.32%Kinosternon leucostomum	40.09%	50.42%Gonatodes albogularis	−0.09	0.3
ChondrichthyesSharks and rays	87	37.55%	1.33	0.036	34.19%Rhizoprionodon acutus	37.45%	40.33%Okamejei kenojei	−0.06	0.59
AmphibiaAmphibians	47	36.84%	3.49	0.095	31.00%Afghanodon mustersi	36.56%	44.40%Pipa pipa	0.02	0.89
BivalviaBivalves	35	34.66%	4.86	0.140	26.54%Corbicula japonica	34.25%	44.06%Cryolaternula elliptica	−0.43	0.01
MalacostracaCrustaceans	30	27.11%	2.48	0.092	22.02%Euphausia pacifica	26.74%	32.57%Panulirus argus	0.07	0.71
CephalopodaCephalopoda	11	25.23%	3.04	0.120	20.85%Amphioctopus fangsiao	24.63%	30.39%Ommastrephes bartramii	−0.02	0.96
CephalaspidomorphiLampreys	10	38.13%	0.66	0.017	36.94%Ichthyomyzon fossor	38.34%	38.92%Lethenteron appendix	−0.18	0.62
GastropodaGastropoda	9	32.35%	2.38	0.074	29.33%Littorina saxatilis	32.13%	36.49%Haliotis rufescens	0.41	0.27
InsectaInsects	4	16.43%	1.50	0.091	15.04%Bombus terrestris	16.19%	18.28%Ceratitis capitata	–	–
SarcopterygiiLobe-finned fishes	4	40.18%	1.98	0.049	37.33%Lepidosiren paradoxa	40.74%	41.92%Latimeria chalumnae	–	–
EchinoideaSea urchins	4	38.11%	0.31	0.008	37.65%Strongylocentrotus purpuratus	38.22%	38.35%Strongylocentrotus droebachiensis	–	–
PolychaetaPolychaeta	4	33.42%	1.43	0.043	31.47%Terebellides stroemii	33.75%	34.69%Nereis pelagica	–	–

Every species

Base counts on the L strand as deposited in RefSeq. Download all 2,332 rows as CSV

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More about this region

16S rRNA gene page 16S rRNA in the taxa table Plot its GC content against lifespan