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

IMGT reference sequences in FASTA format:

Nucleotide 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)
>CQ789650|VSIG4*01|Mus musculus|F|EX1|
atggagatctcatcaggcttgctgttcctgggccacctaatagtgctcacctatg
>CQ789650|VSIG4*01|Mus musculus|F|EX2|[D1]|V-LIKE|
gccaccccaccctaaaaacacctgagagtgtgacagggacctggaaaggagatgtgaaga
ttcagtgcatctatgatcccctgaga..................ggctacaggcaagttt
tggtgaaatggctggtaagacacggctctgactccgtcaccatcttcctacgtgactcc.
.......................actggagaccatatccagcaggcaaagtacagaggcc
gcctgaaagtgagccacaaagttccaggagatgtgtccctccaaataaataccctgcaga
tggatgacaggaatcactatacatgtgaggtcacctggcagactcctgatggaaaccaag
taataagagataagatcattgagctccgtgttcggaaat
>CQ789650|VSIG4*01|Mus musculus|F|EX3|
ataatccacctagaatcaatactgaagcacctacaaccctgcactcctctttggaag
>CQ789650|VSIG4*01|Mus musculus|F|EX4|
caacaactataatgagttcaacctctgacttgaccactaatgggactggaaaacttgagg
agaccattgctggttcag
>CQ789650|VSIG4*01|Mus musculus|F|EX5|
ggaggaacctgccaatctttgccataatcttcatcatctccctttgctgcatagtagctg
tcaccataccttatatcttgttccgctgcaggacattccaacaag
>CQ789650|VSIG4*01|Mus musculus|F|EX6|
agtatgtctatggagtgagcag
>CQ789650|VSIG4*01|Mus musculus|F|EX7|
ggtgtttgccaggaagacaagcaactctgaagaaaccacaagggtgactaccatcgcaac
tgatgaaccagattcccaggctctgattagtgactactctgatgatccttgcctcagcca
ggagtaccaaataaccatcagatcaacaatgtctattcctgcctgc