Here you are: IMGT Web resources > IMGT Repertoire (RPI) > RPI entries from gene to protein

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) 
>M83072|B7A1*01|Homo sapiens|F|EX1|[D1]|V-LIKE|
MGHTRRQGTSPSKCPYLNFFQLLVLAGLSHFCS
>M83073|B7A1*01|Homo sapiens|F|EX2|[D1]|V-LIKE|
GVIHVTKEVKEVATLSCGHNVSVEELAQTRIYWQKEKKMVLTMMSGDMNIWPEYKNRTIF
DITNNLSIVILALRPSDEGTYECVVLKYEKDAFKREHLAEVTLSVK
>M83074|B7A1*01|Homo sapiens|F|EX3|[D2]|C-LIKE|
ADFPTPSISDFEIPTSNIRRIICSTSGGFPEPHLSWLENGEELNAINTTVSQDPETELYA
VSSKLDFNMTTNHSFMCLIKYGHLRVNQTFNWNT
>M83075|B7A1*01|Homo sapiens|F|EX4|
TKQEHFPDNLLPSWAITLISVNGIFVICCLTY
>M83077|B7A1*01|Homo sapiens|F|EX5|
CFAPRCRERRRNERLRRESVRPV
>B7A1*01|Homo sapiens|F|EX1-EX5|Splicing A|complete|
MGHTRRQGTSPSKCPYLNFFQLLVLAGLSHFCSGVIHVTKEVKEVATLSCGHNVSVEELA
QTRIYWQKEKKMVLTMMSGDMNIWPEYKNRTIFDITNNLSIVILALRPSDEGTYECVVLK
YEKDAFKREHLAEVTLSVKADFPTPSISDFEIPTSNIRRIICSTSGGFPEPHLSWLENGE
ELNAINTTVSQDPETELYAVSSKLDFNMTTNHSFMCLIKYGHLRVNQTFNWNTTKQEHFP
DNLLPSWAITLISVNGIFVICCLTYCFAPRCRERRRNERLRRESVRPV*