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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*
>DQ103757|B7H4*01|Homo sapiens|F|EX1|
MASLGQILFWS
>DQ103757|B7H4*01|Homo sapiens|F|EX2|
IISIIIILAGAIALIIGFGIS
>DQ103757|B7H4*01|Homo sapiens|F|EX4|
AFSMPEVNVDYNASSETLRCEAPRWFPQPTVVWASQVDQGANFSEVSNTSFELNSENVTM
KVVSVLYNVTINNTYSCMIENDIAKATGDIKVT
>DQ103757|B7H4*01|Homo sapiens|F|EX5|
ESEIKRRSHLQLLNSKASLCVSSFFAISWALLPLSPYLMLK
>B7H4*01|Homo sapiens|F|EX1-2,4-5|Splicing B|complete|
MASLGQILFWSIISIIIILAGAIALIIGFGISAFSMPEVNVDYNASSETLRCEAPRWFPQ
PTVVWASQVDQGANFSEVSNTSFELNSENVTMKVVSVLYNVTINNTYSCMIENDIAKATG
DIKVTESEIKRRSHLQLLNSKASLCVSSFFAISWALLPLSPYLMLK*
>AY442303|B7H4*01|Homo sapiens|F|EX1|
MASLGQILFWS
>AY442303|B7H4*01|Homo sapiens|F|EX2|
IISIIIILAGAIALIIGFGIS
>AY442303|B7H4*01|Homo sapiens|F|EX3|
EVSVWLSAMKGWCRSSKASLSIDLCFLNFRETLHHSHYCRLSWEHWGGWNPELHF
>B7H4*01|Homo sapiens|F|EX1-3|Splicing D|complete|
MASLGQILFWSIISIIIILAGAIALIIGFGISEVSVWLSAMKGWCRSSKASLSIDLCFLN
FRETLHHSHYCRLSWEHWGGWNPELHF*
>AL391476|B7H4*02|Homo sapiens|F|EX1|
MVLLTSRMKPLTSR
>AL391476|B7H4*02|Homo sapiens|F|EX2|
IISIIIILAGAIALIIGFGIS
>AL391476|B7H4*02|Homo sapiens|F|EX3|[D1]|V-LIKE|
GRHSITVTTVASAGNIGEDGILSCTFEPDIKLSDIVIQWLKEGVLGLVHEFKEGKDELSE
QDEMFRGRTAVFADQVIVGNASLRLKNVQLTDAGTYKCYIITSKGKGNANLEYKTG
>AL391476|B7H4*02|Homo sapiens|F|EX4|[D2]|C-LIKE|
AFSMPEVNVDYNASSETLRCEAPRWFPQPTVVWASQVDQGANFSEVSNTSFELNSENVTM
KVVSVLYNVTINNTYSCMIENDIAKATGDIKVT
>AL391476|B7H4*02|Homo sapiens|F|EX5|
ESEIKRRSHLQLLNSKASLCVSSFFAISWALLPLSPYLMLK
>B7H4*02|Homo sapiens|F|EX1-5|Splicing A|complete|
MVLLTSRMKPLTSRIISIIIILAGAIALIIGFGISGRHSITVTTVASAGNIGEDGILSCT
FEPDIKLSDIVIQWLKEGVLGLVHEFKEGKDELSEQDEMFRGRTAVFADQVIVGNASLRL
KNVQLTDAGTYKCYIITSKGKGNANLEYKTGAFSMPEVNVDYNASSETLRCEAPRWFPQP
TVVWASQVDQGANFSEVSNTSFELNSENVTMKVVSVLYNVTINNTYSCMIENDIAKATGD
IKVTESEIKRRSHLQLLNSKASLCVSSFFAISWALLPLSPYLMLK*