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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) 
>M17076|CD4*01|Mus musculus|F|EX1|
MCRAISLRRLLLLLLQL
>M17076|CD4*01|Mus musculus|F|EX2|[D1]|V-LIKE|
SQLLAVTQEKTLVLGKEGESAELPCESSQKKITVFTWKFSDQRKILGQHGKGVLIR
>M17077|CD4*01|Mus musculus|F|EX3|[D1]|V-LIKE|
GGSPSQFDRFDSKKGAWEKGSFPLIINKLKMEDSQTYICELENRKEEVELWVFK
>M17077|CD4*01|Mus musculus|F|EX4|[D2]|C-LIKE|
VTFSPGTSLLQGQSLTLTLDSNSKVSNPLTECKHKKGKVVSGSKVLSMSNLRVQDSDFWN
CTVTLDQKKNWFGMTLSVL
>M17078|CD4*01|Mus musculus|F|EX5|[D3]|V-LIKE|
GFQSTAITAYKSEGESAEFSFPLNFAEENGWGELMWKAEKDSFFQPWISFSIKNKEVSVQ
KSTKDLKLQLKETLPLTLKIPQVSLQFAGSGNLTLTLDKGTLHQEVNLVVMK
>M17079|CD4*01|Mus musculus|F|EX6|[D4]|C-LIKE|
VAQLNNTLTCEVMGPTSPKMRLTLKQENQEARVSEEQKVVQVVAPETGLWQCLLSEGDKV
KMDSRIQ
>M17080|CD4*01|Mus musculus|F|EX7|
VLSRGVNQTVFLACVLGGSFGFLGFLGLCILCCVRCRHQQ
>M17080|CD4*01|Mus musculus|F|EX8|
RQAARMSQIKRLLSEKKTCQCP
>M17080|CD4*01|Mus musculus|F|EX9|
HRMQKSHNLI
>CD4*01|Mus musculus|F|EX1-EX9|Splicing A|complete|
MCRAISLRRLLLLLLQLSQLLAVTQEKTLVLGKEGESAELPCESSQKKITVFTWKFSDQR
KILGQHGKGVLIRGGSPSQFDRFDSKKGAWEKGSFPLIINKLKMEDSQTYICELENRKEE
VELWVFKVTFSPGTSLLQGQSLTLTLDSNSKVSNPLTECKHKKGKVVSGSKVLSMSNLRV
QDSDFWNCTVTLDQKKNWFGMTLSVLGFQSTAITAYKSEGESAEFSFPLNFAEENGWGEL
MWKAEKDSFFQPWISFSIKNKEVSVQKSTKDLKLQLKETLPLTLKIPQVSLQFAGSGNLT
LTLDKGTLHQEVNLVVMKVAQLNNTLTCEVMGPTSPKMRLTLKQENQEARVSEEQKVVQV
VAPETGLWQCLLSEGDKVKMDSRIQVLSRGVNQTVFLACVLGGSFGFLGFLGLCILCCVR
CRHQQRQAARMSQIKRLLSEKKTCQCPHRMQKSHNLI*
>AC002397|CD4*02|Mus musculus|F|EX1|
MCRAISLRRLLLLLLQL
>AC002397|CD4*02|Mus musculus|F|EX2|[D1]|V-LIKE|
SQLLAVTQGKTLVLGKEGESAELPCESSQKKITVFTWKFSDQRKILGQHGKGVLIR
>AC002397|CD4*02|Mus musculus|F|EX3|[D1]|V-LIKE|
GGSPSQFDRFDSKKGAWEKGSFPLIINKLKMEDSQTYICELENRKEEVELWVFK
>AC002397|CD4*02|Mus musculus|F|EX4|[D2]|C-LIKE|
VTFSPGTSLLQGQSLTLTLDSNSKVSNPLTECKHKKGKVVSGSKVLSMSNLRVQDSDFWN
CTVTLDQKKNWFGMTLSVL
>AC002397|CD4*02|Mus musculus|F|EX5|[D3]|V-LIKE|
GFQSTAITAYKSEGESAEFSFPLNFAEENGWGELMWKAEKDSFFQPWISFSIKNKEVSVQ
KSTKDLKLQLKETLPLTLKIPQVSLQFAGSGNLTLTLDKGTLHQEVNLVVMK
>AC002397|CD4*02|Mus musculus|F|EX6|[D4]|C-LIKE|
VAQLNNTLTCEVMGPTSPKMRLTLKQENQEARVSEEQKVVQVVAPETGLWQCLLSEGDKV
KMDSRIQ
>AC002397|CD4*02|Mus musculus|F|EX7|
VLSRGVNQTVFLACVLGGSFGFLGFLGLCILCCVRCRHQQ
>AC002397|CD4*02|Mus musculus|F|EX8|
RQAARMSQIKRLLSEKKTCQCP
>AC002397|CD4*02|Mus musculus|F|EX9|
HRMQKSHNLI
>CD4*02|Mus musculus|F|EX1-EX9|Splicing A|complete|
MCRAISLRRLLLLLLQLSQLLAVTQGKTLVLGKEGESAELPCESSQKKITVFTWKFSDQR
KILGQHGKGVLIRGGSPSQFDRFDSKKGAWEKGSFPLIINKLKMEDSQTYICELENRKEE
VELWVFKVTFSPGTSLLQGQSLTLTLDSNSKVSNPLTECKHKKGKVVSGSKVLSMSNLRV
QDSDFWNCTVTLDQKKNWFGMTLSVLGFQSTAITAYKSEGESAEFSFPLNFAEENGWGEL
MWKAEKDSFFQPWISFSIKNKEVSVQKSTKDLKLQLKETLPLTLKIPQVSLQFAGSGNLT
LTLDKGTLHQEVNLVVMKVAQLNNTLTCEVMGPTSPKMRLTLKQENQEARVSEEQKVVQV
VAPETGLWQCLLSEGDKVKMDSRIQVLSRGVNQTVFLACVLGGSFGFLGFLGLCILCCVR
CRHQQRQAARMSQIKRLLSEKKTCQCPHRMQKSHNLI*