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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) 
>AB021288|B2M*01|Homo sapiens|F|EX1
...............atgtctcgctccgtggccttagctgtgctcgcgctactctctctt
tctggcctggaggctatccagc
>AB021288|B2M*01|Homo sapiens|F|EX2
gtactccaaagattcaggtttactcacgtcatccagcagagaat............ggaa
agtcaaatttcctgaattgctatgtgtctgggtttcatcca......tccgacattgaag
ttgacttactgaagaatggagagagaattgaa.........aaagtggagcattcagact
tgtctttcagcaaggac..................tggtctttctatctcttgtactaca
ctgaattcaccccc...............actgaaaaagatgagtatgcctgccgtgtga
accatgtgact..........................................ttgtcac
agcccaagatagttaagtgg
>AB021288|B2M*01|Homo sapiens|F|EX3
gatcgagacatg
>AB021288|B2M*01|Homo sapiens|F|L-REGION
...............atgtctcgctccgtggccttagctgtgctcgcgctactctctctt
tctggcctggaggct
>AB021288|B2M*01|Homo sapiens|F|[D]|C-LIKE-DOMAIN
atccagcgtactccaaagattcaggtttactcacgtcatccagcagagaat.........
...ggaaagtcaaatttcctgaattgctatgtgtctgggtttcatcca......tccgac
attgaagttgacttactgaagaatggagagagaattgaa.........aaagtggagcat
tcagacttgtctttcagcaaggac..................tggtctttctatctcttg
tactacactgaattcaccccc...............actgaaaaagatgagtatgcctgc
cgtgtgaaccatgtgact..........................................
ttgtcacagcccaagatagttaagtgggatcgagacatg
>AB021288|B2M*01|Homo sapiens|F
...............atgtctcgctccgtggccttagctgtgctcgcgctactctctctt
tctggcctggaggctatccagcgtactccaaagattcaggtttactcacgtcatccagca
gagaat............ggaaagtcaaatttcctgaattgctatgtgtctgggtttcat
cca......tccgacattgaagttgacttactgaagaatggagagagaattgaa......
...aaagtggagcattcagacttgtctttcagcaaggac..................tgg
tctttctatctcttgtactacactgaattcaccccc...............actgaaaaa
gatgagtatgcctgccgtgtgaaccatgtgact...........................
...............ttgtcacagcccaagatagttaagtgggatcgagacatg