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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) 
>L27587|CD79B*01|Homo sapiens|F|EX1|
atggccaggctggcgttgtctcctgtgcccagccactggatggtggcgttgctgctgctg
ctctcag
>L27587|CD79B*01|Homo sapiens|F|EX2|
ctgagccagtaccagcagccagatcggaggaccggtaccggaatcccaaag
>L27587|CD79B*01|Homo sapiens|F|EX3|[D]|C-LIKE|
gtagtgcttgttcgcggatctggcagagcccacgtttcatagccaggaaacggggcttca
cggtgaaaatgcactgctacatgaacagcgcctccggcaatgtgagctggctctggaagc
aggagatggacgagaatccccagcagctgaagctggaaaagggccgcatggaagagtccc
agaacgaatctctcgccaccctcaccatccaaggcatccggtttgaggacaatggcatct
acttctgtcagcagaagtgcaacaacacctcggaggtctaccagggctgcggcacagagc
tgcgagtcatgg
>L27587|CD79B*01|Homo sapiens|F|EX4|
gattcagcaccttggcacagctgaagcagaggaacacgctgaaggatggtatcatcatga
tccagacgctgctgatcatcctcttcatcatcgtgcctatcttcctgctgctggacaag
>L27587|CD79B*01|Homo sapiens|F|EX5|
gatgacagcaaggctggcatggaggaagatcacacctacgag
>L27587|CD79B*01|Homo sapiens|F|EX6|
ggcctggacattgaccagacagccacctatgaggacatagtgacgctgcggacaggggaa
gtgaagtggtctgtaggtgagcacccaggccaggag
>CD79B*01|Homo sapiens|F|EX1-6|Complete|Splicing A|
atggccaggctggcgttgtctcctgtgcccagccactggatggtggcgttgctgctgctg
ctctcagctgagccagtaccagcagccagatcggaggaccggtaccggaatcccaaaggt
agtgcttgttcgcggatctggcagagcccacgtttcatagccaggaaacggggcttcacg
gtgaaaatgcactgctacatgaacagcgcctccggcaatgtgagctggctctggaagcag
gagatggacgagaatccccagcagctgaagctggaaaagggccgcatggaagagtcccag
aacgaatctctcgccaccctcaccatccaaggcatccggtttgaggacaatggcatctac
ttctgtcagcagaagtgcaacaacacctcggaggtctaccagggctgcggcacagagctg
cgagtcatgggattcagcaccttggcacagctgaagcagaggaacacgctgaaggatggt
atcatcatgatccagacgctgctgatcatcctcttcatcatcgtgcctatcttcctgctg
ctggacaaggatgacagcaaggctggcatggaggaagatcacacctacgagggcctggac
attgaccagacagccacctatgaggacatagtgacgctgcggacaggggaagtgaagtgg
tctgtaggtgagcacccaggccaggagtga