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IMGT reference sequences in FASTA format:

Nucleotide sequences without 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) 
>AJ717664|BTLA*01|Homo sapiens|F|EX1|
atgaagacattgcctgccatgcttggaactgggaaattattttgggtcttcttcttaatc
ccatatctggacatctggaacatccatg
>AJ717664|BTLA*01|Homo sapiens|F|EX2|[D]|C-LIKE|
ggaaagaatcatgtgatgtacagctttatataaagagacaatctgaacactccatcttag
caggagatccctttgaactagaatgccctgtgaaatactgtgctaacaggcctcatgtga
cttggtgcaagctcaatggaacaacatgtgtaaaacttgaagatagacaaacaagttgga
aggaagagaagaacatttcatttttcattctacattttgaaccagtgcttcctaatgaca
atgggtcataccgctgttctgcaaattttcagtctaatctcattgaaagccactcaacaa
ctctttatgtgacag
>AJ717664|BTLA*01|Homo sapiens|F|EX3|
atgtaaaaagtgcctcagaacgaccctccaaggacgaaatggcaagcagaccctggctcc
tgtatagtttacttcctttggggggattgcctctactcatcactacctgtttctgcctgt
tctgctgcctgagaaggcaccaag
>AJ717664|BTLA*01|Homo sapiens|F|EX4|
gaaagcaaaatgaactctctgacacagcaggaagggaaattaacctgg
>AJ717664|BTLA*01|Homo sapiens|F|EX5|
ttgatgctcaccttaagagtgagcaaacagaagcaagcaccaggcaaaattcccaagtac
tgctatcagaaactggaatttatgataatgaccctgacctttgtttcaggatgcaggaag
ggtctgaagtttattctaatccatgcctggaagaaaacaaaccaggcattgtttatgctt
ccctgaaccattctgtcattggactgaactcaagactggcaagaaatgtaaaagaagcac
caacagaatatgcatccatatgtgtgaggagt
>BTLA*01|Homo sapiens|F|EX1-5|
atgaagacattgcctgccatgcttggaactgggaaattattttgggtcttcttcttaatc
ccatatctggacatctggaacatccatgggaaagaatcatgtgatgtacagctttatata
aagagacaatctgaacactccatcttagcaggagatccctttgaactagaatgccctgtg
aaatactgtgctaacaggcctcatgtgacttggtgcaagctcaatggaacaacatgtgta
aaacttgaagatagacaaacaagttggaaggaagagaagaacatttcatttttcattcta
cattttgaaccagtgcttcctaatgacaatgggtcataccgctgttctgcaaattttcag
tctaatctcattgaaagccactcaacaactctttatgtgacagatgtaaaaagtgcctca
gaacgaccctccaaggacgaaatggcaagcagaccctggctcctgtatagtttacttcct
ttggggggattgcctctactcatcactacctgtttctgcctgttctgctgcctgagaagg
caccaaggaaagcaaaatgaactctctgacacagcaggaagggaaattaacctggttgat
gctcaccttaagagtgagcaaacagaagcaagcaccaggcaaaattcccaagtactgcta
tcagaaactggaatttatgataatgaccctgacctttgtttcaggatgcaggaagggtct
gaagtttattctaatccatgcctggaagaaaacaaaccaggcattgtttatgcttccctg
aaccattctgtcattggactgaactcaagactggcaagaaatgtaaaagaagcaccaaca
gaatatgcatccatatgtgtgaggagttaa