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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) 
>AY346100|B7H4*01|Homo sapiens|F|EX1|
MASLGQILFWS
>AY346100|B7H4*01|Homo sapiens|F|EX2|
IISIIIILAGAIALIIGFGIS
>AY346100|B7H4*01|Homo sapiens|F|EX3|[D1]|V-LIKE|
GRHSITVTTVASAGNIGEDGIQSCTFEPDIKLSDIVIQWLKEGVLGLVHEFKEGKDELSE
QDEMFRGRTAVFADQVIVGNASLRLKNVQLTDAGTYKCYIITSKGKGNANLEYKTG
>AY346100|B7H4*01|Homo sapiens|F|EX4|[D2]|C-LIKE|
AFSMPEVNVDYNASSETLRCEAPRWFPQPTVVWASQVDQGANFSEVSNTSFELNSENVTM
KVVSVLYNVTINNTYSCMIENDIAKATGDIKVT
>AY346100|B7H4*01|Homo sapiens|F|EX5|
ESEIKRRSHLQLLNSKASLCVSSFFAISWALLPLSPYLMLK
>B7H4*01|Homo sapiens|F|EX1-5|Splicing A|complete|
MASLGQILFWSIISIIIILAGAIALIIGFGISGRHSITVTTVASAGNIGEDGIQSCTFEP
DIKLSDIVIQWLKEGVLGLVHEFKEGKDELSEQDEMFRGRTAVFADQVIVGNASLRLKNV
QLTDAGTYKCYIITSKGKGNANLEYKTGAFSMPEVNVDYNASSETLRCEAPRWFPQPTVV
WASQVDQGANFSEVSNTSFELNSENVTMKVVSVLYNVTINNTYSCMIENDIAKATGDIKV
TESEIKRRSHLQLLNSKASLCVSSFFAISWALLPLSPYLMLK*