rRNA gene · mtDNA statistics
12S rRNA
12S ribosomal RNA. Length, base composition and strand skews in 2,333 species, by taxon and species by species.
12S rRNA in all species
Every parameter summarised over 2,333 species| Parameter | Species | Mean | SD | CV | Min | Median | Max | r | p |
|---|---|---|---|---|---|---|---|---|---|
| GC %(G + C) / (A + C + G + T) | 2,333 | 45.12% | 4.92 | 14.57%Bombus terrestris | 46.97% | 56.00%Dryobates minor | 0.07 | 3.2 × 10⁻⁴ | |
| AT %(A + T) / (A + C + G + T) | 2,333 | 54.88% | 4.92 | 44.00%Dryobates minor | 53.03% | 85.43%Bombus terrestris | −0.07 | 3.2 × 10⁻⁴ | |
| A %A / (A + C + G + T) | 2,333 | 32.88% | 2.83 | 18.73%Pseudoscaphirhynchus hermanni | 32.11% | 44.96%Amphioctopus fangsiao | 0.13 | 6.7 × 10⁻¹¹ | |
| T %T / (A + C + G + T) | 2,333 | 22.01% | 3.19 | 15.24%Agapornis lilianae | 21.38% | 43.29%Bombus terrestris | −0.23 | 2.5 × 10⁻³⁰ | |
| G %G / (A + C + G + T) | 2,333 | 20.02% | 2.61 | 4.43%Bombus terrestris | 20.29% | 28.24%Tegillarca granosa | −0.05 | 0.02 | |
| C %C / (A + C + G + T) | 2,333 | 25.09% | 3.06 | 7.17%Macrostomum lignano | 25.77% | 36.67%Dryobates minor | 0.16 | 3.6 × 10⁻¹⁵ | |
| GC skew(G − C) / (G + C) on the L strand | 2,333 | −0.113 | 0.070 | −0.437Amphioctopus fangsiao | −0.111 | +0.348Hippospongia lachne | −0.15 | 5.7 × 10⁻¹³ | |
| AT skew(A − T) / (A + T) on the L strand | 2,333 | +0.200 | 0.062 | −0.261Pseudoscaphirhynchus hermanni | +0.204 | +0.407Boa constrictor | 0.31 | 1.1 × 10⁻⁵³ | |
| Length (bp)Length in base pairs | 2,333 | 951 | 47.6 | 71Hemignathus munroi | 955 | 1,249Ruditapes philippinarum | 0.15 | 1.9 × 10⁻¹³ |
12S rRNA by class
GC content of 12S rRNA, % of A + C + G + T| ActinopterygiiRay-finned fishes | 894 | 48.51% | 1.70 | 40.53%Nothobranchius kuhntae | 48.64% | 54.28%Trachinocephalus myops | 0.09 | 0.01 | |
| MammaliaMammals | 627 | 41.20% | 2.03 | 35.22%Apodemus peninsulae | 41.24% | 50.73%Desmodus rotundus | 0.55 | 8.8 × 10⁻⁵² | |
| AvesBirds | 423 | 48.49% | 1.53 | 40.58%Hemignathus munroi | 48.46% | 56.00%Dryobates minor | 0.14 | 0.004 | |
| ReptiliaReptiles | 135 | 43.46% | 2.92 | 37.90%Heloderma suspectum | 42.72% | 51.32%Pogona vitticeps | 0.04 | 0.66 | |
| ChondrichthyesSharks and rays | 87 | 41.72% | 1.35 | 37.59%Torpedo marmorata | 41.93% | 44.01%Hemitriakis japanica | 0.04 | 0.72 | |
| AmphibiaAmphibians | 47 | 41.84% | 3.60 | 35.52%Dermophis mexicanus | 42.76% | 48.03%Pipa pipa | 0.05 | 0.76 | |
| BivalviaBivalves | 35 | 38.28% | 5.35 | 28.25%Geukensia demissa | 36.84% | 47.94%Tegillarca granosa | −0.38 | 0.02 | |
| MalacostracaCrustaceans | 30 | 28.94% | 2.57 | 23.43%Eriocheir sinensis | 29.46% | 34.72%Panulirus argus | −0.24 | 0.2 | |
| CephalopodaCephalopoda | 11 | 25.16% | 3.29 | 20.66%Amphioctopus fangsiao | 24.70% | 31.38%Ommastrephes bartramii | 0.02 | 0.96 | |
| CephalaspidomorphiLampreys | 10 | 44.84% | 0.73 | 43.50%Ichthyomyzon fossor | 45.04% | 45.63%Lampetra fluviatilis | −0.02 | 0.95 | |
| GastropodaGastropoda | 9 | 35.92% | 2.25 | 33.07%Littorina saxatilis | 35.47% | 39.54%Haliotis rufescens | 0.73 | 0.02 | |
| InsectaInsects | 4 | 18.83% | 3.24 | 14.57%Bombus terrestris | 19.21% | 22.34%Ceratitis capitata | – | – | |
| SarcopterygiiLobe-finned fishes | 4 | 44.59% | 2.57 | 40.75%Lepidosiren paradoxa | 45.71% | 46.19%Latimeria chalumnae | – | – | |
| EchinoideaSea urchins | 4 | 42.28% | 1.52 | 40.91%Mesocentrotus franciscanus | 42.07% | 44.08%Strongylocentrotus purpuratus | – | – | |
| PolychaetaPolychaeta | 4 | 36.22% | 1.86 | 33.69%Terebellides stroemii | 36.60% | 37.98%Nereis pelagica | – | – |
Every species
Base counts on the L strand as deposited in RefSeq. Download all 2,333 rows as CSVLoading 2,333 species…