Ichthyomyzon fossor
Northern brook lamprey
GC content
37.09%
Whole genome
Non-coding
755 bp
D-loop 653 bp
Where Northern brook lamprey sits among 2,335 species
Whole-genome GC content against maximum lifespan. Northern brook lamprey has the 1,936th longest lifespan of them.
- This species
- All other species
Base composition
Whole genome16,150 bp
- GC skew (G − C) / (G + C)
- −0.310
- AT skew (A − T) / (A + T)
- +0.059
About this record
- Lifespan source
- FishBase v26.06
- Based on
- an animal in the wild
- Data quality
- acceptable
- Licence
- CC BY-NC 4.0
- Status
- New in build 2
- In the database since
- build 2 (2026-11-13)
The lifespan value is for non-commercial use only; the genome data is not restricted by it.
Every change against the 2015 build is in the changelog download.
Composition by region
Reference (L) strand as deposited in RefSeqWhole genome16,150 bp
Protein-coding11,369 bp
12S rRNA892 bp
16S rRNA1,619 bp
All tRNA1,532 bp
D-loop653 bp
Genes and regions
Select a column to sort; select a gene to compare it across species| Composition | |||||||||
|---|---|---|---|---|---|---|---|---|---|
| ND1NADH dehydrogenase subunit 1 | 966 bp | 36.03% | −0.333 | −0.036 | |||||
| ND2NADH dehydrogenase subunit 2 | 1,042 bp | 33.69% | −0.436 | +0.042 | |||||
| COX1Cytochrome c oxidase subunit I | 1,557 bp | 39.11% | −0.218 | −0.032 | |||||
| COX2Cytochrome c oxidase subunit II | 690 bp | 37.39% | −0.310 | +0.060 | |||||
| ATP8ATP synthase F0 subunit 8 | 168 bp | 37.50% | −0.619 | +0.086 | |||||
| ATP6ATP synthase F0 subunit 6 | 679 bp | 34.17% | −0.509 | +0.007 | |||||
| COX3Cytochrome c oxidase subunit III | 786 bp | 41.73% | −0.293 | −0.022 | |||||
| ND3NADH dehydrogenase subunit 3 | 351 bp | 38.46% | −0.363 | −0.074 | |||||
| ND4LNADH dehydrogenase subunit 4L | 291 bp | 41.24% | −0.467 | +0.029 | |||||
| ND4NADH dehydrogenase subunit 4 | 1,374 bp | 34.93% | −0.446 | +0.009 | |||||
| ND5NADH dehydrogenase subunit 5 | 1,797 bp | 35.06% | −0.413 | +0.057 | |||||
| ND6NADH dehydrogenase subunit 6 | 519 bp | 39.88% | −0.507 | +0.551 | |||||
| CYTBCytochrome b | 1,182 bp | 36.89% | −0.307 | −0.040 | |||||
| 12S rRNA12S ribosomal RNA | 892 bp | 43.50% | −0.180 | +0.206 | |||||
| 16S rRNA16S ribosomal RNA | 1,619 bp | 36.94% | −0.100 | +0.213 | |||||
| D-loopControl region (D-loop) | 653 bp | 34.76% | −0.225 | +0.014 |
Codon usage
Counts per codon, darker is more frequent3,800 codons in all protein-coding genes. Grouped with the Vertebrate mitochondrial code (NCBI table 2).
Phe F6.3%
UUU147
UUC91
Leu L15.7%
UUA172
UUG20
CUU114
CUC69
CUA199
CUG23
Ile I9.3%
AUU243
AUC110
Met M6.2%
AUA205
AUG31
Val V4.2%
GUU63
GUC24
GUA60
GUG13
Ser S6.9%
UCU67
UCC44
UCA93
UCG3
AGU27
AGC29
Pro P5.2%
CCU44
CCC41
CCA107
CCG6
Thr T9.0%
ACU103
ACC93
ACA144
ACG3
Ala A6.9%
GCU84
GCC97
GCA77
GCG3
Tyr Y2.8%
UAU58
UAC50
His H2.7%
CAU41
CAC63
Gln Q2.6%
CAA96
CAG4
Asn N3.9%
AAU87
AAC63
Lys K2.6%
AAA96
AAG3
Asp D1.8%
GAU34
GAC33
Glu E2.5%
GAA87
GAG7
Cys C1.0%
UGU23
UGC15
Trp W2.8%
UGA99
UGG8
Arg R1.8%
CGU20
CGC11
CGA35
CGG2
Gly G5.4%
GGU32
GGC53
GGA88
GGG32
Stop 0.3%
UAA5
UAG1
AGA3
AGG2
Genome map
39 annotated features in NC_025552.1Hover, 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-loop2
- Outer ring: + strand, arrows run clockwise. Inner ring: − strand.
- Middle ring: GC% of each gene against the whole genome (37.1%, dashed): out is GC-richer, in is AT-richer (full height = 6 points).
All 39 features as a table
| Feature | Type | Start | End | Length | Strand | GC |
|---|---|---|---|---|---|---|
| COX1 | Protein-coding gene | 1 | 1,557 | 1,557 bp | + | 39.1% |
| tRNA-Ser (UCN) | Transfer RNA | 1,548 | 1,619 | 72 bp | − | – |
| tRNA-Asp | Transfer RNA | 1,620 | 1,687 | 68 bp | + | – |
| COX2 | Protein-coding gene | 1,691 | 2,380 | 690 bp | + | 37.4% |
| tRNA-Lys | Transfer RNA | 2,390 | 2,457 | 68 bp | + | – |
| ATP8 | Protein-coding gene | 2,459 | 2,626 | 168 bp | + | 37.5% |
| ATP6 | Protein-coding gene | 2,617 | 3,295 | 679 bp | + | 34.2% |
| COX3 | Protein-coding gene | 3,296 | 4,081 | 786 bp | + | 41.7% |
| tRNA-Gly | Transfer RNA | 4,090 | 4,159 | 70 bp | + | – |
| ND3 | Protein-coding gene | 4,161 | 4,511 | 351 bp | + | 38.5% |
| tRNA-Arg | Transfer RNA | 4,516 | 4,581 | 66 bp | + | – |
| ND4L | Protein-coding gene | 4,590 | 4,880 | 291 bp | + | 41.2% |
| ND4 | Protein-coding gene | 4,874 | 6,247 | 1,374 bp | + | 34.9% |
| tRNA-His | Transfer RNA | 6,249 | 6,317 | 69 bp | + | – |
| tRNA-Ser (AGY) | Transfer RNA | 6,317 | 6,386 | 70 bp | + | – |
| tRNA-Leu (CUN) | Transfer RNA | 6,388 | 6,459 | 72 bp | + | – |
| ND5 | Protein-coding gene | 6,461 | 8,257 | 1,797 bp | + | 35.1% |
| ND6 | Protein-coding gene | 8,242 | 8,760 | 519 bp | − | 39.9% |
| D-loop | Control region | 8,761 | 9,359 | 599 bp | – | 34.8% |
| tRNA-Thr | Transfer RNA | 9,360 | 9,432 | 73 bp | + | – |
| tRNA-Glu | Transfer RNA | 9,434 | 9,504 | 71 bp | − | – |
| D-loop | Control region | 9,505 | 9,558 | 54 bp | – | 34.8% |
| CYTB | Protein-coding gene | 9,559 | 10,740 | 1,182 bp | + | 36.9% |
| tRNA-Pro | Transfer RNA | 10,734 | 10,804 | 71 bp | − | – |
| tRNA-Phe | Transfer RNA | 10,818 | 10,885 | 68 bp | + | – |
| 12S rRNA | Ribosomal RNA | 10,886 | 11,777 | 892 bp | + | 43.5% |
| tRNA-Val | Transfer RNA | 11,778 | 11,848 | 71 bp | + | – |
| 16S rRNA | Ribosomal RNA | 11,849 | 13,467 | 1,619 bp | + | 36.9% |
| tRNA-Leu (UUR) | Transfer RNA | 13,468 | 13,541 | 74 bp | + | – |
| ND1 | Protein-coding gene | 13,546 | 14,511 | 966 bp | + | 36.0% |
| tRNA-Ile | Transfer RNA | 14,537 | 14,605 | 69 bp | + | – |
| tRNA-Gln | Transfer RNA | 14,612 | 14,682 | 71 bp | − | – |
| tRNA-Met | Transfer RNA | 14,683 | 14,750 | 68 bp | + | – |
| ND2 | Protein-coding gene | 14,752 | 15,793 | 1,042 bp | + | 33.7% |
| tRNA-Trp | Transfer RNA | 15,794 | 15,861 | 68 bp | + | – |
| tRNA-Ala | Transfer RNA | 15,864 | 15,931 | 68 bp | − | – |
| tRNA-Asn | Transfer RNA | 15,937 | 16,005 | 69 bp | − | – |
| tRNA-Cys | Transfer RNA | 16,008 | 16,073 | 66 bp | − | – |
| tRNA-Tyr | Transfer RNA | 16,079 | 16,149 | 71 bp | − | – |