Upcoming Ensembl Platform Transition

This is the final release of its kind on this website.

In summer 2026, this site will bring you to the new Ensembl platform currently at beta.ensembl.org.
Please bookmark this archive to retain access to the current site, tools and functionality until they are available on the new platform -> jun2026.archive.ensembl.org

Mouse vs Long-tailed chinchilla LastZ results

Mouse (Mus musculus, GRCm39) and Long-tailed chinchilla (Chinchilla lanigera, ChiLan1.0) were aligned using the LastZ alignment algorithm (LastZ) in Ensembl release 103. Mouse was used as the reference species. After running LastZ, the raw LastZ alignment blocks were chained according to their location in both genomes. During the final netting process, the best sub-chain was chosen in each region on the reference species.

Configuration parameters

ParameterValue
Gap open penalty (O)400
Gap extend penalty (E)30
HSP threshold (K)3000
Threshold for gapped extension (L)3000
Threshold for alignments between gapped alignment blocks (H)2200
Seed and Transition value (T)1
Scoring matrix (Q)
Default:
     A    C    G    T
    91 -114  -31 -123
  -114  100 -125  -31
   -31 -125  100 -114
  -123  -31 -114   91

Chunking parameters

ParameterMouseLong-tailed chinchilla
Chunk size10,000,00010,100,000
Overlap0100,000
Group set size10,100,000
Masking options

Statistics over 1,376,063 alignment blocks

Genome coverage (bp) Coding exon coverage (bp)
Mouse

Uncovered: 1,829,698,974 out of 2,728,222,451
Covered: 898,523,477 out of 2,728,222,451

Uncovered: 2,595,194 out of 39,092,596
Matches: 29,059,056 out of 39,092,596
Mismatches: 7,051,178 out of 39,092,596
Insertions: 387,168 out of 39,092,596
Identity over aligned base-pairs: 79.6%

Long-tailed chinchilla

Uncovered: 1,533,491,486 out of 2,390,868,971
Covered: 857,377,485 out of 2,390,868,971

Uncovered: 795,297 out of 30,052,602
Matches: 24,429,688 out of 30,052,602
Mismatches: 4,643,591 out of 30,052,602
Insertions: 184,026 out of 30,052,602
Identity over aligned base-pairs: 83.5%

Block size distribution

Size range All 1,376,063 alignment blocks Blocks grouped in nets
# blocks Total size (incl. gaps) # nets Total size (incl. gaps)
1 bp - 10 bp
16,044
107.1 kb
10 bp - 100 bp
125,232
7.1 Mb
14,753
1.0 Mb
100 bp - 1 kb
922,672
424.1 Mb
65,588
25.0 Mb
1 kb - 10 kb
311,709
539.1 Mb
19,940
47.2 Mb
10 kb - 100 kb
403
6.0 Mb
804
18.0 Mb
100 kb - 1 Mb
3
418.1 kb
207
85.4 Mb
1 Mb - 10 Mb
225
696.9 Mb
10 Mb - 100 Mb
8
103.3 Mb