Branchiostoma belcheri
Belcher's lancelet
GC content
35.27%
Whole genome
Non-coding
137 bp
Including the D-loop
Where Belcher's lancelet sits among 2,335 species
Whole-genome GC content against maximum lifespan. Belcher's lancelet has the 2,085th longest lifespan of them.
- This species
- All other species
Base composition
Whole genome15,076 bp
- GC skew (G − C) / (G + C)
- +0.213
- AT skew (A − T) / (A + T)
- −0.150
About this record
- Lifespan source
- SeaLifeBase v26.06
- Based on
- an observed animal, origin not stated
- 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 genome15,076 bp
Protein-coding11,286 bp
12S rRNA847 bp
16S rRNA1,383 bp
All tRNA1,453 bp
Genes and regions
Select a column to sort; select a gene to compare it across species| Composition | |||||||||
|---|---|---|---|---|---|---|---|---|---|
| ND1NADH dehydrogenase subunit 1 | 945 bp | 36.93% | +0.169 | −0.285 | |||||
| ND2NADH dehydrogenase subunit 2 | 1,041 bp | 37.85% | +0.345 | −0.218 | |||||
| COX1Cytochrome c oxidase subunit I | 1,548 bp | 36.50% | +0.168 | −0.243 | |||||
| COX2Cytochrome c oxidase subunit II | 691 bp | 36.32% | +0.251 | −0.186 | |||||
| ATP8ATP synthase F0 subunit 8 | 165 bp | 34.55% | +0.298 | −0.074 | |||||
| ATP6ATP synthase F0 subunit 6 | 684 bp | 34.65% | +0.139 | −0.145 | |||||
| COX3Cytochrome c oxidase subunit III | 789 bp | 40.18% | +0.199 | −0.220 | |||||
| ND3NADH dehydrogenase subunit 3 | 354 bp | 30.51% | +0.204 | −0.268 | |||||
| ND4LNADH dehydrogenase subunit 4L | 276 bp | 31.52% | +0.195 | −0.249 | |||||
| ND4NADH dehydrogenase subunit 4 | 1,359 bp | 35.54% | +0.288 | −0.183 | |||||
| ND5NADH dehydrogenase subunit 5 | 1,797 bp | 34.61% | +0.225 | −0.142 | |||||
| ND6NADH dehydrogenase subunit 6 | 504 bp | 35.52% | +0.218 | +0.089 | |||||
| CYTBCytochrome b | 1,141 bp | 36.28% | +0.121 | −0.282 | |||||
| 12S rRNA12S ribosomal RNA | 847 bp | 35.30% | +0.271 | −0.044 | |||||
| 16S rRNA16S ribosomal RNA | 1,383 bp | 32.90% | +0.275 | 0.000 |
Codon usage
Counts per codon, darker is more frequent3,764 codons in all protein-coding genes. Grouped with the Vertebrate mitochondrial code (NCBI table 2).
Phe F6.9%
UUU227
UUC34
Leu L16.0%
UUA316
UUG123
CUU76
CUC8
CUA61
CUG19
Ile I6.5%
AUU199
AUC44
Met M5.6%
AUA148
AUG61
Val V8.8%
GUU115
GUC24
GUA119
GUG72
Ser S6.6%
UCU86
UCC11
UCA48
UCG22
AGU60
AGC20
Pro P4.0%
CCU68
CCC19
CCA45
CCG20
Thr T4.9%
ACU75
ACC9
ACA69
ACG31
Ala A7.4%
GCU125
GCC17
GCA92
GCG44
Tyr Y4.1%
UAU120
UAC34
His H2.4%
CAU80
CAC11
Gln Q2.3%
CAA51
CAG34
Asn N3.2%
AAU101
AAC18
Lys K1.9%
AAA43
AAG30
Asp D2.1%
GAU61
GAC17
Glu E2.7%
GAA52
GAG48
Cys C1.0%
UGU33
UGC5
Trp W2.9%
UGA62
UGG48
Arg R1.9%
CGU22
CGC2
CGA18
CGG30
Gly G7.9%
GGU81
GGC16
GGA67
GGG132
Stop 1.1%
UAA5
UAG6
AGA29
AGG1
Genome map
37 annotated features in NC_004537.1Hover, 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
- Outer ring: + strand, arrows run clockwise. Inner ring: − strand.
- Middle ring: GC% of each gene against the whole genome (35.3%, dashed): out is GC-richer, in is AT-richer (full height = 6 points).
All 37 features as a table
| Feature | Type | Start | End | Length | Strand | GC |
|---|---|---|---|---|---|---|
| CYTB | Protein-coding gene | 1 | 1,141 | 1,141 bp | + | 36.3% |
| tRNA-Thr | Transfer RNA | 1,143 | 1,207 | 65 bp | − | – |
| tRNA-Pro | Transfer RNA | 1,208 | 1,272 | 65 bp | + | – |
| 12S rRNA | Ribosomal RNA | 1,273 | 2,119 | 847 bp | + | 35.3% |
| tRNA-Phe | Transfer RNA | 2,120 | 2,182 | 63 bp | + | – |
| tRNA-Val | Transfer RNA | 2,186 | 2,257 | 72 bp | + | – |
| 16S rRNA | Ribosomal RNA | 2,258 | 3,640 | 1,383 bp | + | 32.9% |
| tRNA-Leu (UUR) | Transfer RNA | 3,642 | 3,711 | 70 bp | + | – |
| ND1 | Protein-coding gene | 3,712 | 4,656 | 945 bp | + | 36.9% |
| tRNA-Ile | Transfer RNA | 4,657 | 4,719 | 63 bp | + | – |
| tRNA-Met | Transfer RNA | 4,720 | 4,786 | 67 bp | + | – |
| tRNA-Gln | Transfer RNA | 4,787 | 4,854 | 68 bp | − | – |
| ND2 | Protein-coding gene | 4,856 | 5,896 | 1,041 bp | + | 37.9% |
| tRNA-Asn | Transfer RNA | 5,889 | 5,960 | 72 bp | − | – |
| tRNA-Trp | Transfer RNA | 5,961 | 6,027 | 67 bp | + | – |
| tRNA-Ala | Transfer RNA | 6,026 | 6,088 | 63 bp | − | – |
| tRNA-Cys | Transfer RNA | 6,089 | 6,147 | 59 bp | − | – |
| tRNA-Tyr | Transfer RNA | 6,148 | 6,212 | 65 bp | − | – |
| COX1 | Protein-coding gene | 6,217 | 7,764 | 1,548 bp | + | 36.5% |
| tRNA-Ser (UCN) | Transfer RNA | 7,762 | 7,832 | 71 bp | − | – |
| tRNA-Asp | Transfer RNA | 7,841 | 7,903 | 63 bp | + | – |
| COX2 | Protein-coding gene | 7,907 | 8,597 | 691 bp | + | 36.3% |
| tRNA-Lys | Transfer RNA | 8,598 | 8,662 | 65 bp | + | – |
| ATP8 | Protein-coding gene | 8,663 | 8,827 | 165 bp | + | 34.6% |
| ATP6 | Protein-coding gene | 8,821 | 9,504 | 684 bp | + | 34.7% |
| COX3 | Protein-coding gene | 9,504 | 10,292 | 789 bp | + | 40.2% |
| ND3 | Protein-coding gene | 10,293 | 10,646 | 354 bp | + | 30.5% |
| tRNA-Arg | Transfer RNA | 10,647 | 10,708 | 62 bp | + | – |
| ND4L | Protein-coding gene | 10,712 | 10,987 | 276 bp | + | 31.5% |
| ND4 | Protein-coding gene | 10,989 | 12,347 | 1,359 bp | + | 35.5% |
| tRNA-His | Transfer RNA | 12,348 | 12,414 | 67 bp | + | – |
| tRNA-Ser (AGY) | Transfer RNA | 12,415 | 12,481 | 67 bp | + | – |
| tRNA-Leu (CUN) | Transfer RNA | 12,482 | 12,547 | 66 bp | + | – |
| ND5 | Protein-coding gene | 12,548 | 14,344 | 1,797 bp | + | 34.6% |
| tRNA-Gly | Transfer RNA | 14,455 | 14,521 | 67 bp | + | – |
| ND6 | Protein-coding gene | 14,503 | 15,006 | 504 bp | − | 35.5% |
| tRNA-Glu | Transfer RNA | 15,008 | 15,075 | 68 bp | − | – |