Crocodylus johnstoni
Johnson's crocodile
GC content
43.75%
Whole genome
Non-coding
1,347 bp
D-loop 1,119 bp
Where Johnson's crocodile sits among 2,335 species
Whole-genome GC content against maximum lifespan. Johnson's crocodile has the 124th longest lifespan of them.
- This species
- Other reptiles
- Other classes
Base composition
Whole genome16,851 bp
- GC skew (G − C) / (G + C)
- −0.317
- AT skew (A − T) / (A + T)
- +0.137
About this record
- Lifespan source
- AnAge build 15
- Based on
- an animal in the wild
- Data quality
- questionable, medium 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 genome16,851 bp
Protein-coding11,382 bp
12S rRNA983 bp
16S rRNA1,597 bp
All tRNA1,547 bp
D-loop1,119 bp
Genes and regions
Select a column to sort; select a gene to compare it across species| Composition | |||||||||
|---|---|---|---|---|---|---|---|---|---|
| ND1NADH dehydrogenase subunit 1 | 963 bp | 45.28% | −0.294 | +0.017 | |||||
| ND2NADH dehydrogenase subunit 2 | 1,056 bp | 44.89% | −0.443 | +0.093 | |||||
| COX1Cytochrome c oxidase subunit I | 1,557 bp | 44.00% | −0.261 | +0.030 | |||||
| COX2Cytochrome c oxidase subunit II | 684 bp | 42.69% | −0.356 | +0.163 | |||||
| ATP8ATP synthase F0 subunit 8 | 162 bp | 37.04% | −0.500 | +0.255 | |||||
| ATP6ATP synthase F0 subunit 6 | 696 bp | 44.25% | −0.481 | +0.160 | |||||
| COX3Cytochrome c oxidase subunit III | 784 bp | 45.66% | −0.324 | +0.052 | |||||
| ND3NADH dehydrogenase subunit 3 | 348 bp | 46.26% | −0.280 | +0.091 | |||||
| ND4LNADH dehydrogenase subunit 4L | 294 bp | 45.24% | −0.444 | −0.056 | |||||
| ND4NADH dehydrogenase subunit 4 | 1,374 bp | 43.60% | −0.399 | +0.117 | |||||
| ND5NADH dehydrogenase subunit 5 | 1,860 bp | 45.59% | −0.436 | +0.144 | |||||
| ND6NADH dehydrogenase subunit 6 | 528 bp | 47.35% | −0.480 | +0.453 | |||||
| CYTBCytochrome b | 1,156 bp | 46.28% | −0.376 | +0.072 | |||||
| 12S rRNA12S ribosomal RNA | 983 bp | 48.32% | −0.120 | +0.256 | |||||
| 16S rRNA16S ribosomal RNA | 1,597 bp | 42.96% | −0.131 | +0.273 | |||||
| D-loopControl region (D-loop) | 1,119 bp | 31.19% | −0.215 | +0.127 |
Codon usage
Counts per codon, darker is more frequent3,820 codons in all protein-coding genes. Grouped with the Vertebrate mitochondrial code (NCBI table 2).
Phe F5.7%
UUU72
UUC145
Leu L16.8%
UUA103
UUG28
CUU73
CUC90
CUA269
CUG77
Ile I7.7%
AUU124
AUC169
Met M5.3%
AUA145
AUG58
Val V4.9%
GUU36
GUC46
GUA76
GUG29
Ser S7.6%
UCU27
UCC85
UCA105
UCG11
AGU13
AGC51
Pro P5.4%
CCU18
CCC50
CCA122
CCG17
Thr T9.3%
ACU41
ACC145
ACA156
ACG13
Ala A7.8%
GCU40
GCC148
GCA98
GCG12
Tyr Y3.1%
UAU39
UAC78
His H2.5%
CAU17
CAC79
Gln Q2.9%
CAA91
CAG20
Asn N3.4%
AAU28
AAC100
Lys K2.3%
AAA77
AAG9
Asp D2.0%
GAU18
GAC58
Glu E2.3%
GAA70
GAG19
Cys C0.7%
UGU10
UGC17
Trp W2.6%
UGA79
UGG22
Arg R1.8%
CGU5
CGC16
CGA41
CGG6
Gly G5.7%
GGU15
GGC68
GGA93
GGG42
Stop 0.3%
UAA7
UAG2
AGA0
AGG2
Genome map
38 annotated features in NC_015238.2Hover, 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 (43.7%, 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 |
|---|---|---|---|---|---|---|
| 12S rRNA | Ribosomal RNA | 1 | 983 | 983 bp | + | 48.3% |
| tRNA-Val | Transfer RNA | 984 | 1,052 | 69 bp | + | – |
| 16S rRNA | Ribosomal RNA | 1,055 | 2,651 | 1,597 bp | + | 43.0% |
| tRNA-Leu (UUR) | Transfer RNA | 2,649 | 2,723 | 75 bp | + | – |
| ND1 | Protein-coding gene | 2,724 | 3,686 | 963 bp | + | 45.3% |
| tRNA-Ile | Transfer RNA | 3,685 | 3,756 | 72 bp | + | – |
| tRNA-Gln | Transfer RNA | 3,755 | 3,825 | 71 bp | − | – |
| tRNA-Met | Transfer RNA | 3,828 | 3,896 | 69 bp | + | – |
| ND2 | Protein-coding gene | 3,901 | 4,956 | 1,056 bp | + | 44.9% |
| tRNA-Trp | Transfer RNA | 4,957 | 5,030 | 74 bp | + | – |
| tRNA-Ala | Transfer RNA | 5,033 | 5,101 | 69 bp | − | – |
| tRNA-Asn | Transfer RNA | 5,103 | 5,175 | 73 bp | − | – |
| tRNA-Cys | Transfer RNA | 5,183 | 5,248 | 66 bp | − | – |
| tRNA-Tyr | Transfer RNA | 5,249 | 5,319 | 71 bp | − | – |
| COX1 | Protein-coding gene | 5,321 | 6,877 | 1,557 bp | + | 44.0% |
| tRNA-Ser (UCN) | Transfer RNA | 6,898 | 6,967 | 70 bp | − | – |
| tRNA-Asp | Transfer RNA | 6,971 | 7,042 | 72 bp | + | – |
| COX2 | Protein-coding gene | 7,043 | 7,726 | 684 bp | + | 42.7% |
| tRNA-Lys | Transfer RNA | 7,728 | 7,802 | 75 bp | + | – |
| ATP8 | Protein-coding gene | 7,804 | 7,965 | 162 bp | + | 37.0% |
| ATP6 | Protein-coding gene | 7,944 | 8,639 | 696 bp | + | 44.3% |
| COX3 | Protein-coding gene | 8,639 | 9,422 | 784 bp | + | 45.7% |
| tRNA-Gly | Transfer RNA | 9,423 | 9,492 | 70 bp | + | – |
| ND3 | Protein-coding gene | 9,493 | 9,840 | 348 bp | + | 46.3% |
| tRNA-Arg | Transfer RNA | 9,851 | 9,919 | 69 bp | + | – |
| ND4L | Protein-coding gene | 9,923 | 10,216 | 294 bp | + | 45.2% |
| ND4 | Protein-coding gene | 10,210 | 11,583 | 1,374 bp | + | 43.6% |
| tRNA-Ser (AGY) | Transfer RNA | 11,614 | 11,674 | 61 bp | + | – |
| tRNA-His | Transfer RNA | 11,692 | 11,761 | 70 bp | + | – |
| tRNA-Leu (CUN) | Transfer RNA | 11,789 | 11,859 | 71 bp | + | – |
| ND5 | Protein-coding gene | 11,863 | 13,722 | 1,860 bp | + | 45.6% |
| ND6 | Protein-coding gene | 13,673 | 14,200 | 528 bp | − | 47.4% |
| tRNA-Glu | Transfer RNA | 14,201 | 14,271 | 71 bp | − | – |
| CYTB | Protein-coding gene | 14,286 | 15,441 | 1,156 bp | + | 46.3% |
| tRNA-Thr | Transfer RNA | 15,500 | 15,571 | 72 bp | + | – |
| tRNA-Pro | Transfer RNA | 15,584 | 15,651 | 68 bp | − | – |
| tRNA-Phe | Transfer RNA | 15,662 | 15,732 | 71 bp | + | – |
| D-loop | Control region | 15,733 | 16,851 | 1,119 bp | – | 31.2% |