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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) 
>AJ132502|VSIG4*01|Homo sapiens|F|EX1|
MGILLGLLLLGHLTVDTY
>AJ132502|VSIG4*01|Homo sapiens|F|EX2|[D1]|V-LIKE|
GRPILEVPESVTGPWKGDVNLPCTYDPLQ......GYTQVLVKWLVQRGSDPVTIFLRDS
........SGDHIQQAKYQGRLHVSHKVPGDVSLQLSTLEMDDRSHYTCEVTWQTPDGNQ
VVRDKITELRVQK
>AJ132502|VSIG4*01|Homo sapiens|F|EX3|[D2]|C-LIKE|
....LSVSKPTVTTGSG.YGFTVP.QGMRISLQCQARGSP....PISYIWYKQQ......
.TNNQEPIKV............ATLSTLLFKPAVI..ADSGSYFCTAKGQVGSEQHSDIV
KFVVKDSSK
>AJ132502|VSIG4*01|Homo sapiens|F|EX4|
DSSKLLKTKTEAPTTMTYPLK
>AJ132502|VSIG4*01|Homo sapiens|F|EX5|
ATSTVKQSWDWTTDMDGYLGETSAGP
>AJ132502|VSIG4*01|Homo sapiens|F|EX6|
GKSLPVFAIILIISLCCMVVFTMAYIMLCRKTSQQ
>AJ132502|VSIG4*01|Homo sapiens|F|EX7|
EHVYEAA
>AJ132502|VSIG4*01|Homo sapiens|F|EX8|
RAHAREANDSGETMRVAIFASGCSSDEPTSQNLGNNYSDEPCIGQEYQIIAQINGNYARL
LDTVPLDYEFLATEGKSVC
>AY358341|VSIG4*01|Homo sapiens|F|EX1|Splicing B|
MGILLGLLLLGHLTVDTY
>AY358341|VSIG4*01|Homo sapiens|F|EX2|[D1]|V-LIKE|Splicing B|
GRPILEVPESVTGPWKGDVNLPCTYDPLQ......GYTQVLVKWLVQRGSDPVTIFLRDS
........SGDHIQQAKYQGRLHVSHKVPGDVSLQLSTLEMDDRSHYTCEVTWQTPDGNQ
VVRDKITELRVQK
>AY358341|VSIG4*01|Homo sapiens|F|EX3|[D2]|C-LIKE|Splicing B|
....LSVSKPTVTTGSG.YGFTVP.QGMRISLQCQARGSP....PISYIWYKQQ......
.TNNQEPIKV............ATLSTLLFKPAVI..ADSGSYFCTAKGQVGSEQHSDIV
KFVVKDSSK
>AY358341|VSIG4*01|Homo sapiens|F|EX4|Splicing B|
DSSKLLKTKTEAPTTMTYPLK
>AY358341|VSIG4*01|Homo sapiens|F|EX5|Splicing B|
ATSTVKQSWDWTTDMDGYLGETSAGP
>AY358341|VSIG4*01|Homo sapiens|F|EX6|Splicing B|
GKSLPVFAIILIISLCCMVVFTMAYIMLCRKTSQQ
>AY358341|VSIG4*01|Homo sapiens|F|EX7|Splicing B|
EHVYEAA