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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) 
>M12807|CD4*01|Homo sapiens|F|EX1|
MNRGVPFRHLLLVLQL
>M12807|CD4*01|Homo sapiens|F|EX2|[D1]|V-LIKE|
ALLPAATQGKKVVLGKKGDTVELTCTASQKKSIQFHWKNSNQIKILGNQGSFLTK
>M12807|CD4*01|Homo sapiens|F|EX3|[D1]|V-LIKE|
GPSKLNDRADSRRSLWDQGNFPLIIKNLKIEDSDTYICEVEDQKEEVQLLVFG
>M12807|CD4*01|Homo sapiens|F|EX4|[D2]|C-LIKE|
LTANSDTHLLQGQSLTLTLESPPGSSPSVQCRSPRGKNIQGGKTLSVSQLELQDSGTWTC
TVLQNQKKVEFKIDIVVL
>M12807|CD4*01|Homo sapiens|F|EX5|[D3]|V-LIKE|
AFQKASSIVYKKEGEQVEFSFPLAFTVEKLTGSGELWWQAERASSSKSWITFDLKNKEVS
VKRVTQDPKLQMGKKLPLHLTLPQALPQYAGSGNLTLALEAKTGKLHQEVNLVVMR
>M12807|CD4*01|Homo sapiens|F|EX6|[D4]|C-LIKE|
ATQLQKNLTCEVWGPTSPKLMLSLKLENKEAKVSKREKAVWVLNPEAGMWQCLLSDSGQV
LLESNIK
>M12807|CD4*01|Homo sapiens|F|EX7|
VLPTWSTPVQPMALIVLGGVAGLLLFIGLGIFFCVRCRHRR
>M12807|CD4*01|Homo sapiens|F|EX8|
RQAERMSQIKRLLSEKKTCQCP
>M12807|CD4*01|Homo sapiens|F|EX9|
HRFQKTCSPI
>CD4*01|Homo sapiens|F|EX1-EX9|Splicing A|complete|
MNRGVPFRHLLLVLQLALLPAATQGKKVVLGKKGDTVELTCTASQKKSIQFHWKNSNQIK
ILGNQGSFLTKGPSKLNDRADSRRSLWDQGNFPLIIKNLKIEDSDTYICEVEDQKEEVQL
LVFGLTANSDTHLLQGQSLTLTLESPPGSSPSVQCRSPRGKNIQGGKTLSVSQLELQDSG
TWTCTVLQNQKKVEFKIDIVVLAFQKASSIVYKKEGEQVEFSFPLAFTVEKLTGSGELWW
QAERASSSKSWITFDLKNKEVSVKRVTQDPKLQMGKKLPLHLTLPQALPQYAGSGNLTLA
LEAKTGKLHQEVNLVVMRATQLQKNLTCEVWGPTSPKLMLSLKLENKEAKVSKREKAVWV
LNPEAGMWQCLLSDSGQVLLESNIKVLPTWSTPVQPMALIVLGGVAGLLLFIGLGIFFCV
RCRHRRRQAERMSQIKRLLSEKKTCQCPHRFQKTCSPI*