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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) 
>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|
................gtagtgcttgttcgcggatctggcagagcccacgtttcatagcc
aggaaacgg.........ggcttcacggtgaaaatgcactgctacatgaacagcgcctcc
ggc.........aatgtgagctggctctggaagcaggagatggacgagaatccc......
...cagcagctgaagctggaaaagggccgcatggaagag..................tcc
cagaacgaatctctcgccaccctcaccatccaaggcatccggttt......gaggacaat
ggcatctacttctgtcagcagaagtgcaacaacacctcggaggtctaccagggctgcggc
acagagctgcgagtcatgg
>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
>BC002975|CD79B*02|Homo sapiens|F|EX1|
atggccaggctggcgttgtctcctgtgcccagccactggatggtggcgttgctgctgctg
ctctcag
>BC002975|CD79B*02|Homo sapiens|F|EX2|
ctgagccagtaccagcagccagatcggaggaccggtaccggaatcccaaag
>BC002975|CD79B*02|Homo sapiens|F|EX3|[D]|C-LIKE|
................gtagtgcttgttcgcggatctggcagagcccacgtttcatagcc
aggaaacgg.........ggcttcacggtgaaaatgcactgctacatgaacagcgcctcc
ggc.........aatgtgagctggctctggaagcaggagatggacgagaatccc......
...cagcagctgaagctggaaaagggccgcatggaagag..................tcc
cagaacgaatctctcgccaccctcaccatccaaggcatccggttt......gaggacaat
ggcatctacttctgccagcagaagtgcaacaacacctcggaggtctaccagggctgcggc
acagagctgcgagtcatgg
>BC002975|CD79B*02|Homo sapiens|F|EX4|
gattcagcaccttggcacagctgaagcagaggaacacgctgaaggatggtatcatcatga
tccagacgctgctgatcatcctcttcatcatcgtgcctatcttcctgctgctggacaag
>BC002975|CD79B*02|Homo sapiens|F|EX5|
gatgacagcaaggctggcatggaggaagatcacacctacgag
>BC002975|CD79B*02|Homo sapiens|F|EX6|
ggcctggacattgaccagacagccacctatgaggacatagtgacgctgcggacaggggaa
gtgaagtggtctgtaggtgagcacccaggccaggag
>M80461|CD79B*03|Homo sapiens|F|EX1|
atggccaggctggcgttgtctcctgtgcccagccactggatggtggcgttgctgctgctg
ctctcag
>M80461|CD79B*03|Homo sapiens|F|EX2|
ctgagccagtaccagcagccagatcggaggaccggtaccggaatcccaaag
>M80461|CD79B*03|Homo sapiens|F|EX3|[D]|C-LIKE|
................gtagtgcttgttcgcggatctggcagagcccacgtttcatagcc
aggaaacgg.........cgcttcacggtgaaaatgcactgctacatgaacagcgcctcc
ggc.........aatgtgagctggctctggaagcaggagatggacgagaatccc......
...cagcagctgaagctggaaaagggccgcatggaagag..................tcc
cagaacgaatctctcgccaccctcaccatccaaggcatccggttt......gaggacaat
ggcatctacttctgccagcagaagtgcaacaacacctcggaggtctaccagggctgcggc
acagagctgcgagtcatgg
>M80461|CD79B*03|Homo sapiens|F|EX4|
gattcagcaccttggcacagctgaagcagaggaacacgctgaaggatggtatcatcatga
tccagacgctgctgatcatcctcttcatcatcgtgcctatcttcctgctgctggacaag
>M80461|CD79B*03|Homo sapiens|F|EX5|
gatgacagcaaggctggcatggaggaagatcacacctacgag
>M80461|CD79B*03|Homo sapiens|F|EX6|
ggcctggacattgaccagacagccacctatgaggacatagtgacgctgcggacaggggaa
gtgaagtggtctgtaggtgagcacccaggccaggag
>S52229|CD79B*04|Homo sapiens|F|EX1|
atggccaggctggcgttgtctcctgtgcccagccactggatggtggctttgctgctgctg
ctctcag
>S52229|CD79B*04|Homo sapiens|F|EX2|
ctgagccagtaccagcagccagatcggaggaccggtaccggaatcccaaag
>S52229|CD79B*04|Homo sapiens|F|EX3|[D]|C-LIKE|
................gtagtgcttgttcgcggatctggcagagcccacgtttcatagcc
aggaaacgg.........cgcttcacggtgaaaatgcactgctacatgaacagcgcctcc
ggc.........aatgtgagctggctctggaagcaggagatggacgagaatccc......
...cagcagctgaagctggaaaagggccgcatggaagag..................tcc
cagaacgaatctctcgccaccctcaccatccaaggcatccggttt......gaggacaat
ggcatctacttctgccagcagaagtgcaacaacacctcggaggtctaccagggctgcggc
acagagctgcgagtcatgg
>S52229|CD79B*04|Homo sapiens|F|EX4|
gattcagcaccttggcacagctgaagcagaggaacacgctgaaggatggtatcatcatga
tccagacgctgctgatcatcctcttcatcatcgtgcctatcttcctgctgctggacaag
>S52229|CD79B*04|Homo sapiens|F|EX5|
gatgacagcaaggctggcatggaggaagatcacacctacgag
>S52229|CD79B*04|Homo sapiens|F|EX6|
ggcctggacattgaccagacagccacctatgaggacatagtgacgctgcggacaggggaa
gtgaagtggtctgtaggtgagcacccaggccaggag