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IMGT reference sequences in FASTA format:

Nucleotide sequences with gaps

The FASTA header contains:
IMGT accession number | gene and allele name | species | functionality | exon name | domain name | domain type | alternative splicing (if it is) | partial (if it is) 
>AY293285|BTLA*01|Mus musculus|F|EX1|L-REGION|
atgaagacagtgcctgccatgcttgggactcctcggttatttagggaattcttcatcctc
catctgggcctctggagcatcctttgtgagaaagctactaagaggaatg
>AY293285|BTLA*01|Mus musculus|F|EX2|[D]|C-LIKE|
atgaagagtgtgaagtgcaacttaatattaagaggaattccaaacactctgcctggaca.
.....ggagagttatttaaaattgaatgtcctgtgaaatactgtgtt.............
..catagacctaatgtgacttggtgtaagcacaatggaacaatctgggtaccccttgaag
ttggtcctcagctatacactagttgggaagaaaatcga......................
........tcagttccggtttttgttctccattttaaaccaatacatctc..........
..agtgataacgggtcgtatagctgttctacaaacttcaat.........tctcaagtta
ttaatagccattcagtaaccatccatgtgagag
>AY293285|BTLA*01|Mus musculus|F|EX3|CO|
aaaggactcaaaactcttcagaacacccactaataa
>AY293285|BTLA*01|Mus musculus|F|EX4|CO+TM+CY|
cagtatctgacatcccagatgccaccaatgcctcaggaccatccaccatggaagagaggc
caggcaggacttggctgctttacaccttgcttcctttgggggcattgcttctgctccttg
cctgtgtctgcctgctctgctttctgaaaaggatccaag
>AY293285|BTLA*01|Mus musculus|F|EX5|CY|
ggaaagaaaagaagccttctgacttggcaggaagggacactaacctg
>AY293285|BTLA*01|Mus musculus|F|EX6|CY|
gttgatattccagccagttccaggacaaatcaccaagcactgccatcaggaactggaatt
tatgataatgatccctggtctagcatgcaggatgaatctgaattgacaattagcttgcaa
tcagagagaaacaaccagggcattgtttatgcttctttgaaccattgtgttattggaagg
aatccaagacaggaaaacaacatgcaggaggcacccacagaatatgcatccatttgtgtg
agaagt
>BC108964|BTLA*02|Mus musculus|F|EX1|L-REGION|
atgaagacagtgcctgccatgcttgggactcctcggttatttagggaattcttcatcctc
catctgggcctctggagcatcctttgtgagaaagctactaagaggaatg
>BC108964|BTLA*02|Mus musculus|F|EX2|[D]|C-LIKE|
atgaagagtgtgaagtgcaacttaatattaagaggaattccaaacactctgcctggaca.
.....ggagagttatttaaaattgaatgtcctgtgaaatactgtgtt.............
..catagacctcatgtgacttggtgtaagcacaatggaacaatctgggtaccccttgaag
ttggtcctcagctatacactagttgggaagaaaatcga......................
........tcagttccggtttttgttctccattttaaaccaatacatctc..........
..agtgataacgggtcgtatagctgttctacaaacttcaat.........tctcaagtta
ttaatagccattcagtaaccatccatgtgagag
>BC108964|BTLA*02|Mus musculus|F|EX3|CO|
aaaggactcaaaactcttcagaacacccactaataa
>BC108964|BTLA*02|Mus musculus|F|EX4|CO+TM+CY|
cagtatctgacatcccagatgccaccaatgcctcaggaccatccaccatggaagagaggc
caggcaggacttggctgctttacaccttgcttcctttgggggcattgcttctgctccttg
cctgtgtctgcctgctctgctttctgaaaaggatccaag
>BC108964|BTLA*02|Mus musculus|F|EX5|CY|
ggaaagaaaagaagccttctgacttggcaggaagggacactaacctg
>BC108964|BTLA*02|Mus musculus|F|EX6|CY|
gttgatattccagccagttccaggacaaatcaccaagcactgccatcaggaactggaatt
tatgataatgatccctggtctagcatgcaggatgaatctgaattgacaattagcttgcaa
tcagagagaaacaaccagggcattgtttatgcttctttgaaccattgtgttattggaagg
aatccaagacaggaaaacaacatgcaggaggcacccacagaatatgcatccatttgtgtg
agaagt
>BC108963|BTLA*03|Mus musculus|F|EX1|L-REGION|SplicingB|
atgaagacagtgcctgccatgcttgggactcctcggttatttagggaattcttcatcctc
catctgggcctctggagcatcctttgtgagaaagctactaagaggaatg
>BC108963|BTLA*03|Mus musculus|F|EX2|[D]|C-LIKE|SplicingB|
atgaagagtgtgaagtgcaacttaatattaagaggaattccaaacactctgcctggaca.
.....ggagagttatttaaaattgaatgtcctgtgaaatactgtgtt.............
..catagacctaatgtgacttggtgtaagcacaatggaacaatctgggtaccccttgaag
ttggtcctcagctatacactagttgggaagaaaatcga......................
........tcagttccggtttttgttctccattttaaaccaatacatctc..........
..agtgataacgggtcgtatagctgttctacaaacttcaat.........tctcaagtta
ttaatagccattcagtaaccatccatgtgagag
>BC108963|BTLA*03|Mus musculus|F|EX3|CO|SplicingB|
aaaggactcaaaactcttcagaacacccactaataa
>BC108963|BTLA*03|Mus musculus|F|EX4|CO+TM+CY|SplicingB|
tatctgacatcccagatgccaccaatgcctcaggaccatccaccatggaaaagaggccag
gcaggacttggctgctttacaccttgcttcctttgggggcattgcttctgctccttgcct
gtgtctgcctgctctgctttctgaaaaggatccaag
>BC108963|BTLA*03|Mus musculus|F|EX5|CY|SplicingB|
ggaaagaaaagaagccttctgacttggcaggaagggacactaacctg
>BC108963|BTLA*03|Mus musculus|F|EX6|CY|SplicingB|
gttgatattccagccagttccaggacaaatcaccaagcactgccatcaggaactggaatt
tatgataatgatccctggtctagcatgcaggatgaatctgaattgacaattagcttgcaa
tcagagagaaacaaccagggcattgtttatgcttctttgaaccattgtgttattggaagg
aatccaagacaggaaaacaacatgcaggaggcacccacagaatatgcatccatttgtgtg
agaagt
>AY293285|BTLA*04|Mus musculus|F|EX1|L-REGION|SplicingB|
atgaagacagtgcctgccatgcttgggactcctcggttatttagggaattcttcatcctc
catctgggcctctggagcatcctttgtgagaaagctactaagaggaatg
>AY293285|BTLA*04|Mus musculus|F|EX2|[D]|C-LIKE|SplicingB|
atgaagagtgtccagtgcaacttactattacgaggaattccaaacagtctgccaggaca.
.....ggagagttatttaaaattcaatgtcctgtgaaatactgtgtt.............
..catagacctaatgtgacttggtgtaagcacaatggaacaatctgtgtaccccttgagg
ttagccctcagctatacactagttgggaagaaaatcaa......................
........tcagttccggtttttgttctccactttaaaccaatacatctc..........
..agtgataatgggtcgtatagctgttctacaaacttcaat.........tctcaagtta
ttaatagccattcagtaaccatccatgtgacag
>AY293285|BTLA*04|Mus musculus|F|EX3|CO|SplicingB|
aaaggactcaaaactcttcagaacacccactaataa
>AY293285|BTLA*04|Mus musculus|F|EX4|CO+TM+CY|SplicingB|
cagtatctgacatcccagatgccaccaatgcctcaggaccatccaccatggaagagaggc
caggcaggacttggctgctttacaccttgcttcctttgggggcattgcttctgctccttg
cctgtgtctgcctgctctgctttctgaaaaggatccaag
>AY293285|BTLA*04|Mus musculus|F|EX5|CY|SplicingB|
ggaaagaaaagaagccttctgacttggcaggaagggacactaacctg
>AY293285|BTLA*04|Mus musculus|F|EX6|CY|SplicingB|
gttgatattccagccagttccaggacaaatcaccaagcactgccatcaggaactggaatt
tatgataatgatccctggtctagcatgcaggatgaatctgaattgacaattagcttgcaa
tcagagagaaacaaccagggcattgtttatgcttctttgaaccattgtgttattggaagg
aatccaagacaggaaaacaacatgcaggaggcacccacagaatatgcatccatttgtgtg
agaagt