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IMGT reference sequences in FASTA format:

Amino acid 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) 
>S74019|VPREB1*01|Homo sapiens|F|EX1|
MSWAPVLLMLFVYCT
>S74019|VPREB1*01|Homo sapiens|F|EX2|
GCGPQPVLHQPPA.MSSALGTTIRLTCTLRNDHDI...GVYSVYWYQQRPGHPPRFLLRY
FSQ...SDKSQGPQVP.PRFSGSKDVARNRGYLSISELQPEDEAMYYCAMGARSSEKEER
EREWEEEMEPTAARTRVP
>M34927|VPREB1*02|Homo sapiens|F|EX1|
MSWAPVLLMHFVYCT
>M34927|VPREB1*02|Homo sapiens|F|EX2|
GCGPQPVLHQPPA.MSSALGTTIRLTCTLRNDHDI...GVYSVYWYQQRPGHPPRFLLRY
FSQ...SDKSQGPQVP.PRFSGSKDVARNRGYLSISELQPEDEAMYYCAMGARSSEKEER
EREWEEEMEPTAARTRVP