Mercenaria mercenaria
Northern quahog
GC content
31.05%
Whole genome
Non-coding
3,543 bp
D-loop 2,258 bp
Where Northern quahog sits among 2,335 species
Whole-genome GC content against maximum lifespan. Northern quahog has the 23rd longest lifespan of them.
- This species
- All other species
Base composition
Whole genome18,365 bp
- GC skew (G − C) / (G + C)
- +0.392
- AT skew (A − T) / (A + T)
- −0.212
About this record
- Lifespan source
- AnAge build 15
- Based on
- an animal in the wild
- Data quality
- acceptable, small sample
- Licence
- Free to use, subject to the Human Ageing Genomic Resources conditions of use
- Status
- New in build 2
- In the database since
- build 2 (2026-11-13)
Every change against the 2015 build is in the changelog download.
Composition by region
Reference (L) strand as deposited in RefSeqWhole genome18,365 bp
Protein-coding11,335 bp
12S rRNA868 bp
16S rRNA1,219 bp
All tRNA1,400 bp
D-loop2,258 bp
Genes and regions
Select a column to sort; select a gene to compare it across species| Composition | |||||||||
|---|---|---|---|---|---|---|---|---|---|
| ND1NADH dehydrogenase subunit 1 | 915 bp | 33.66% | +0.455 | −0.301 | |||||
| ND2NADH dehydrogenase subunit 2 | 1,014 bp | 29.98% | +0.533 | −0.293 | |||||
| COX1Cytochrome c oxidase subunit I | 1,569 bp | 36.14% | +0.316 | −0.315 | |||||
| COX2Cytochrome c oxidase subunit II | 795 bp | 31.32% | +0.446 | −0.114 | |||||
| ATP8ATP synthase F0 subunit 8 | 168 bp | 30.36% | +0.255 | −0.333 | |||||
| ATP6ATP synthase F0 subunit 6 | 660 bp | 32.12% | +0.264 | −0.313 | |||||
| COX3Cytochrome c oxidase subunit III | 853 bp | 34.47% | +0.354 | −0.363 | |||||
| ND3NADH dehydrogenase subunit 3 | 405 bp | 31.11% | +0.524 | −0.305 | |||||
| ND4LNADH dehydrogenase subunit 4L | 279 bp | 28.32% | +0.443 | −0.420 | |||||
| ND4NADH dehydrogenase subunit 4 | 1,359 bp | 31.42% | +0.466 | −0.303 | |||||
| ND5NADH dehydrogenase subunit 5 | 1,698 bp | 31.27% | +0.367 | −0.265 | |||||
| ND6NADH dehydrogenase subunit 6 | 477 bp | 30.82% | +0.565 | −0.279 | |||||
| CYTBCytochrome b | 1,143 bp | 33.86% | +0.282 | −0.325 | |||||
| 12S rRNA12S ribosomal RNA | 868 bp | 29.15% | +0.273 | +0.008 | |||||
| 16S rRNA16S ribosomal RNA | 1,219 bp | 28.38% | +0.382 | −0.045 | |||||
| D-loopControl region (D-loop) | 2,258 bp | 31.49% | +0.418 | −0.135 |
Codon usage
Counts per codon, darker is more frequent3,778 codons in all protein-coding genes. Grouped with the Invertebrate mitochondrial code (NCBI table 5).
Phe F9.8%
UUU329
UUC43
Leu L14.7%
UUA262
UUG163
CUU72
CUC3
CUA31
CUG26
Ile I6.0%
AUU215
AUC11
Met M5.8%
AUA120
AUG101
Val V11.0%
GUU207
GUC12
GUA111
GUG84
Ser S10.1%
UCU109
UCC10
UCA31
UCG15
AGU72
AGC9
AGA72
AGG63
Pro P2.9%
CCU75
CCC1
CCA19
CCG16
Thr T2.9%
ACU73
ACC4
ACA18
ACG16
Ala A3.9%
GCU97
GCC9
GCA19
GCG23
Tyr Y3.9%
UAU128
UAC20
His H1.6%
CAU55
CAC4
Gln Q1.4%
CAA34
CAG19
Asn N3.1%
AAU102
AAC17
Lys K2.9%
AAA72
AAG39
Asp D1.9%
GAU64
GAC9
Glu E2.8%
GAA56
GAG51
Cys C2.4%
UGU82
UGC9
Trp W2.8%
UGA64
UGG43
Arg R1.6%
CGU22
CGC1
CGA21
CGG15
Gly G7.9%
GGU138
GGC4
GGA78
GGG78
Stop 0.3%
UAA8
UAG4
Genome map
38 annotated features in NC_048487.1Hover, tap or tab to a feature to see its position, length, strand and GC content. Genes and rRNAs open their own pages.
- Protein-coding13
- rRNA2
- tRNA22
- D-loop1
- Outer ring: + strand, arrows run clockwise. Inner ring: − strand.
- Middle ring: GC% of each gene against the whole genome (31.1%, dashed): out is GC-richer, in is AT-richer (full height = 6 points).
All 38 features as a table
| Feature | Type | Start | End | Length | Strand | GC |
|---|---|---|---|---|---|---|
| ND6 | Protein-coding gene | 1 | 477 | 477 bp | + | 30.8% |
| tRNA-Lys | Transfer RNA | 493 | 556 | 64 bp | + | – |
| tRNA-Val | Transfer RNA | 560 | 622 | 63 bp | + | – |
| tRNA-Phe | Transfer RNA | 631 | 694 | 64 bp | + | – |
| tRNA-Trp | Transfer RNA | 694 | 755 | 62 bp | + | – |
| tRNA-Arg | Transfer RNA | 755 | 815 | 61 bp | + | – |
| tRNA-Leu (UUR) | Transfer RNA | 818 | 881 | 64 bp | + | – |
| tRNA-Gly | Transfer RNA | 881 | 945 | 65 bp | + | – |
| tRNA-Gln | Transfer RNA | 957 | 1,023 | 67 bp | + | – |
| tRNA-Thr | Transfer RNA | 1,034 | 1,099 | 66 bp | + | – |
| tRNA-Ser (AGY) | Transfer RNA | 1,105 | 1,171 | 67 bp | + | – |
| COX3 | Protein-coding gene | 1,172 | 2,024 | 853 bp | + | 34.5% |
| tRNA-Ala | Transfer RNA | 2,025 | 2,087 | 63 bp | + | – |
| COX1 | Protein-coding gene | 2,109 | 3,677 | 1,569 bp | + | 36.1% |
| tRNA-Leu (CUN) | Transfer RNA | 3,725 | 3,787 | 63 bp | + | – |
| ND1 | Protein-coding gene | 3,788 | 4,702 | 915 bp | + | 33.7% |
| ND2 | Protein-coding gene | 4,777 | 5,790 | 1,014 bp | + | 30.0% |
| tRNA-Ile | Transfer RNA | 5,791 | 5,854 | 64 bp | + | – |
| tRNA-Pro | Transfer RNA | 5,868 | 5,931 | 64 bp | + | – |
| CYTB | Protein-coding gene | 5,969 | 7,111 | 1,143 bp | + | 33.9% |
| 16S rRNA | Ribosomal RNA | 7,121 | 8,339 | 1,219 bp | + | 28.4% |
| tRNA-Met | Transfer RNA | 8,616 | 8,681 | 66 bp | + | – |
| tRNA-Tyr | Transfer RNA | 8,700 | 8,761 | 62 bp | + | – |
| 12S rRNA | Ribosomal RNA | 8,767 | 9,634 | 868 bp | + | 29.2% |
| ND4L | Protein-coding gene | 9,744 | 10,022 | 279 bp | + | 28.3% |
| ATP8 | Protein-coding gene | 10,047 | 10,214 | 168 bp | + | 30.4% |
| ND4 | Protein-coding gene | 10,220 | 11,578 | 1,359 bp | + | 31.4% |
| tRNA-Ser (UCN) | Transfer RNA | 11,589 | 11,651 | 63 bp | + | – |
| tRNA-His | Transfer RNA | 11,668 | 11,729 | 62 bp | + | – |
| tRNA-Glu | Transfer RNA | 11,739 | 11,802 | 64 bp | + | – |
| ATP6 | Protein-coding gene | 11,924 | 12,583 | 660 bp | + | 32.1% |
| ND3 | Protein-coding gene | 12,643 | 13,047 | 405 bp | + | 31.1% |
| ND5 | Protein-coding gene | 13,086 | 14,783 | 1,698 bp | + | 31.3% |
| tRNA-Cys | Transfer RNA | 15,011 | 15,072 | 62 bp | + | – |
| tRNA-Asn | Transfer RNA | 15,081 | 15,142 | 62 bp | + | – |
| COX2 | Protein-coding gene | 15,239 | 16,033 | 795 bp | + | 31.3% |
| tRNA-Asp | Transfer RNA | 16,043 | 16,107 | 65 bp | + | – |
| D-loop | Control region | 16,108 | 18,365 | 2,258 bp | – | 31.5% |