Squalidus chankaensis
Khanka gudgeon
GC content
44.55%
Whole genome
Non-coding
991 bp
D-loop 928 bp
Where Khanka gudgeon sits among 2,335 species
Whole-genome GC content against maximum lifespan. Khanka gudgeon has the 2,140th longest lifespan of them.
- This species
- Other ray-finned fishes
- Other classes
Base composition
Whole genome16,611 bp
- GC skew (G − C) / (G + C)
- −0.239
- AT skew (A − T) / (A + T)
- +0.075
About this record
- Lifespan source
- FishBase v26.06
- Based on
- an observed animal, origin not stated
- Data quality
- questionable
- 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 genome16,611 bp
Protein-coding11,403 bp
12S rRNA959 bp
16S rRNA1,693 bp
All tRNA1,566 bp
D-loop928 bp
Genes and regions
Select a column to sort; select a gene to compare it across species| Composition | |||||||||
|---|---|---|---|---|---|---|---|---|---|
| ND1NADH dehydrogenase subunit 1 | 975 bp | 46.46% | −0.302 | +0.008 | |||||
| ND2NADH dehydrogenase subunit 2 | 1,045 bp | 45.65% | −0.379 | +0.148 | |||||
| COX1Cytochrome c oxidase subunit I | 1,551 bp | 45.00% | −0.186 | −0.069 | |||||
| COX2Cytochrome c oxidase subunit II | 691 bp | 45.30% | −0.272 | +0.063 | |||||
| ATP8ATP synthase F0 subunit 8 | 165 bp | 38.79% | −0.438 | +0.168 | |||||
| ATP6ATP synthase F0 subunit 6 | 684 bp | 42.69% | −0.349 | −0.046 | |||||
| COX3Cytochrome c oxidase subunit III | 784 bp | 47.58% | −0.249 | −0.032 | |||||
| ND3NADH dehydrogenase subunit 3 | 350 bp | 41.71% | −0.274 | −0.078 | |||||
| ND4LNADH dehydrogenase subunit 4L | 297 bp | 45.46% | −0.289 | −0.012 | |||||
| ND4NADH dehydrogenase subunit 4 | 1,381 bp | 45.91% | −0.293 | +0.047 | |||||
| ND5NADH dehydrogenase subunit 5 | 1,836 bp | 43.63% | −0.358 | +0.088 | |||||
| ND6NADH dehydrogenase subunit 6 | 522 bp | 45.79% | −0.389 | +0.442 | |||||
| CYTBCytochrome b | 1,141 bp | 45.22% | −0.310 | −0.024 | |||||
| 12S rRNA12S ribosomal RNA | 959 bp | 49.84% | −0.088 | +0.252 | |||||
| 16S rRNA16S ribosomal RNA | 1,693 bp | 43.36% | −0.055 | +0.255 | |||||
| D-loopControl region (D-loop) | 928 bp | 35.67% | −0.172 | −0.022 |
Codon usage
Counts per codon, darker is more frequent3,805 codons in all protein-coding genes. Grouped with the Vertebrate mitochondrial code (NCBI table 2).
Phe F5.9%
UUU104
UUC122
Leu L16.5%
UUA77
UUG20
CUU121
CUC108
CUA249
CUG52
Ile I7.4%
AUU180
AUC101
Met M4.7%
AUA103
AUG74
Val V6.0%
GUU55
GUC47
GUA102
GUG23
Ser S6.5%
UCU50
UCC55
UCA77
UCG8
AGU14
AGC42
Pro P5.7%
CCU30
CCC92
CCA77
CCG16
Thr T8.0%
ACU39
ACC99
ACA151
ACG14
Ala A8.9%
GCU54
GCC149
GCA121
GCG16
Tyr Y2.9%
UAU55
UAC57
His H2.7%
CAU21
CAC82
Gln Q2.5%
CAA79
CAG15
Asn N3.3%
AAU37
AAC88
Lys K2.0%
AAA70
AAG6
Asp D2.0%
GAU16
GAC61
Glu E2.7%
GAA73
GAG31
Cys C0.7%
UGU10
UGC15
Trp W3.2%
UGA104
UGG17
Arg R2.0%
CGU8
CGC9
CGA40
CGG20
Gly G6.4%
GGU21
GGC64
GGA98
GGG59
Stop 0.2%
UAA6
UAG1
AGA0
AGG0
Genome map
38 annotated features in NC_050647.1Hover, 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 (44.5%, 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 |
|---|---|---|---|---|---|---|
| tRNA-Phe | Transfer RNA | 1 | 69 | 69 bp | + | – |
| 12S rRNA | Ribosomal RNA | 70 | 1,028 | 959 bp | + | 49.8% |
| tRNA-Val | Transfer RNA | 1,029 | 1,100 | 72 bp | + | – |
| 16S rRNA | Ribosomal RNA | 1,101 | 2,793 | 1,693 bp | + | 43.4% |
| tRNA-Leu (UUR) | Transfer RNA | 2,794 | 2,869 | 76 bp | + | – |
| ND1 | Protein-coding gene | 2,871 | 3,845 | 975 bp | + | 46.5% |
| tRNA-Ile | Transfer RNA | 3,850 | 3,921 | 72 bp | + | – |
| tRNA-Gln | Transfer RNA | 3,920 | 3,990 | 71 bp | − | – |
| tRNA-Met | Transfer RNA | 3,992 | 4,060 | 69 bp | + | – |
| ND2 | Protein-coding gene | 4,061 | 5,105 | 1,045 bp | + | 45.7% |
| tRNA-Trp | Transfer RNA | 5,106 | 5,177 | 72 bp | + | – |
| tRNA-Ala | Transfer RNA | 5,179 | 5,247 | 69 bp | − | – |
| tRNA-Asn | Transfer RNA | 5,249 | 5,321 | 73 bp | − | – |
| tRNA-Cys | Transfer RNA | 5,353 | 5,422 | 70 bp | − | – |
| tRNA-Tyr | Transfer RNA | 5,424 | 5,494 | 71 bp | − | – |
| COX1 | Protein-coding gene | 5,496 | 7,046 | 1,551 bp | + | 45.0% |
| tRNA-Ser (UCN) | Transfer RNA | 7,047 | 7,117 | 71 bp | − | – |
| tRNA-Asp | Transfer RNA | 7,121 | 7,192 | 72 bp | + | – |
| COX2 | Protein-coding gene | 7,206 | 7,896 | 691 bp | + | 45.3% |
| tRNA-Lys | Transfer RNA | 7,897 | 7,972 | 76 bp | + | – |
| ATP8 | Protein-coding gene | 7,974 | 8,138 | 165 bp | + | 38.8% |
| ATP6 | Protein-coding gene | 8,132 | 8,815 | 684 bp | + | 42.7% |
| COX3 | Protein-coding gene | 8,815 | 9,598 | 784 bp | + | 47.6% |
| tRNA-Gly | Transfer RNA | 9,599 | 9,670 | 72 bp | + | – |
| ND3 | Protein-coding gene | 9,671 | 10,020 | 350 bp | + | 41.7% |
| tRNA-Arg | Transfer RNA | 10,021 | 10,090 | 70 bp | + | – |
| ND4L | Protein-coding gene | 10,091 | 10,387 | 297 bp | + | 45.5% |
| ND4 | Protein-coding gene | 10,381 | 11,761 | 1,381 bp | + | 45.9% |
| tRNA-His | Transfer RNA | 11,761 | 11,831 | 71 bp | + | – |
| tRNA-Ser (AGY) | Transfer RNA | 11,832 | 11,900 | 69 bp | + | – |
| tRNA-Leu (CUN) | Transfer RNA | 11,902 | 11,974 | 73 bp | + | – |
| ND5 | Protein-coding gene | 11,975 | 13,810 | 1,836 bp | + | 43.6% |
| ND6 | Protein-coding gene | 13,807 | 14,328 | 522 bp | − | 45.8% |
| tRNA-Glu | Transfer RNA | 14,329 | 14,397 | 69 bp | − | – |
| CYTB | Protein-coding gene | 14,402 | 15,542 | 1,141 bp | + | 45.2% |
| tRNA-Thr | Transfer RNA | 15,543 | 15,614 | 72 bp | + | – |
| tRNA-Pro | Transfer RNA | 15,614 | 15,683 | 70 bp | − | – |
| D-loop | Control region | 15,684 | 16,611 | 928 bp | – | 35.7% |