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IMGT reference sequences in FASTA format:

Amino acid 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) 
>S74019|VPREB1*01|Homo sapiens|F|EX1|
MSWAPVLLMLFVYCT
>S74019|VPREB1*01|Homo sapiens|F|EX2|
GCGPQPVLHQPPAMSSALGTTIRLTCTLRNDHDIGVYSVYWYQQRPGHPPRFLLRYFSQS
DKSQGPQVPPRFSGSKDVARNRGYLSISELQPEDEAMYYCAMGARSSEKEEREREWEEEM
EPTAARTRVP
>VPREB1*01|Homo sapiens|F|EX1-2|Complete|Splicing A|
MSWAPVLLMLFVYCTGCGPQPVLHQPPAMSSALGTTIRLTCTLRNDHDIGVYSVYWYQQR
PGHPPRFLLRYFSQSDKSQGPQVPPRFSGSKDVARNRGYLSISELQPEDEAMYYCAMGAR
SSEKEEREREWEEEMEPTAARTRVP