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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*
>M35160|CD4*02|Homo sapiens|F|EX1|
MNRGVPFRHLLLVLQL
>M35160|CD4*02|Homo sapiens|F|EX2|[D1]|V-LIKE|
ALLPAATQGKKVVLGKKGDTVELTCTASQKKSIQFHWKNSNQIKILGNQGSFLTK
>M35160|CD4*02|Homo sapiens|F|EX3|[D1]|V-LIKE|
GPSKLNDRADSRRSLWDQGNFPLIIKNLKIEDSDTYICEVEDQKEEVQLLVFG
>M35160|CD4*02|Homo sapiens|F|EX4|[D2]|C-LIKE|
LTANSDTHLLQGQSLTLTLESPPGSSPSVQCRSPRGKNIQGGKTLSVSQLELQDSGTWTC
TVLQNQKKVEFKIDIVVL
>M35160|CD4*02|Homo sapiens|F|EX5|[D3]|V-LIKE|
AFQKASSIVYKKEGEQVEFSFPLAFTVEKLTGSGELWWQAERASSSKSWITFDLKNKEVS
VKWVTQDPKLQMGKKLPLHLTLPQALPQYAGSGNLTLALEAKTGKLHQEVNLVVMR
>M35160|CD4*02|Homo sapiens|F|EX6|[D4]|C-LIKE|
ATQLQKNLTCEVWGPTSPKLMLSLKLENKEAKVSKREKAVWVLNPEAGMWQCLLSDSGQV
LLESNIK
>M35160|CD4*02|Homo sapiens|F|EX7|
VLPTWSTPVQPMALIVLGGVAGLLLFIGLGIFFCVRCRHRR
>M35160|CD4*02|Homo sapiens|F|EX8|
RQAERMSQIKRLLSEKKTCQCP
>M35160|CD4*02|Homo sapiens|F|EX9|
HRFQKTCSPI
>CD4*02|Homo sapiens|F|EX1-EX9|Splicing A|complete|
MNRGVPFRHLLLVLQLALLPAATQGKKVVLGKKGDTVELTCTASQKKSIQFHWKNSNQIK
ILGNQGSFLTKGPSKLNDRADSRRSLWDQGNFPLIIKNLKIEDSDTYICEVEDQKEEVQL
LVFGLTANSDTHLLQGQSLTLTLESPPGSSPSVQCRSPRGKNIQGGKTLSVSQLELQDSG
TWTCTVLQNQKKVEFKIDIVVLAFQKASSIVYKKEGEQVEFSFPLAFTVEKLTGSGELWW
QAERASSSKSWITFDLKNKEVSVKWVTQDPKLQMGKKLPLHLTLPQALPQYAGSGNLTLA
LEAKTGKLHQEVNLVVMRATQLQKNLTCEVWGPTSPKLMLSLKLENKEAKVSKREKAVWV
LNPEAGMWQCLLSDSGQVLLESNIKVLPTWSTPVQPMALIVLGGVAGLLLFIGLGIFFCV
RCRHRRRQAERMSQIKRLLSEKKTCQCPHRFQKTCSPI*
>U40625|CD4*03|Homo sapiens|F|EX4|[D2]|C-LIKE|partial|
ANSDTHLLQGQSLTLTLESPPGSSPSVQCRSPRGKNIQGGKTLSVSQLELQDSGTWTCTV
LQNQKKVEFKIDIVVL
>U40625|CD4*03|Homo sapiens|F|EX5|[D3]|V-LIKE|partial|
AF
>DQ012936|CD4*04|Homo sapiens|F|EX1|
MNRGVPFRHLLLVLQL
>DQ012936|CD4*04|Homo sapiens|F|EX2|[D1]|V-LIKE|
ALLPAATQGKKVVLGKKGDTVELTCTASQKKSIQFHWKNSNQIKILGNQGSFLTK
>DQ012936|CD4*04|Homo sapiens|F|EX3|[D1]|V-LIKE|
GPSKLNDRADSRRSLWDQGNFPLIIKNLKIEDSDTYICEVEDQKEEVQLLVFG
>DQ012936|CD4*04|Homo sapiens|F|EX4|[D2]|C-LIKE|
LTANSDTHLLQGQSLTLTLESPPGSSPSVQCRSPRGKNIQGGKTLSVSQLELQDSGTWTC
TVLQNQKKVEFKIDIVVL
>DQ012936|CD4*04|Homo sapiens|F|EX5|[D3]|V-LIKE|
AFQKASSIVYKKEGEQVEFSFPLAFTVEKLTGSGELWWQAERASSSKSWITFDLKNKEVS
VKRVTQDPKLQMGKKLPLHLTLPQALPQYAGSGNLTLALEAKTGKLHQEVNLVVMR
>DQ012936|CD4*04|Homo sapiens|F|EX6|[D4]|C-LIKE|
ATQLQKNLTCEVWGPTSPKLMLSLKLENKEAKVSKREKAVWVLNPEAGMWQCLLSDSGQV
LLESNIK
>DQ012936|CD4*04|Homo sapiens|F|EX7|
VLPTWSTPVQPMALIVLGGVAGLLLFIGLGIFFCVRCRHRR
>DQ012936|CD4*04|Homo sapiens|F|EX8|
RQAERMSQIKRLLSEKKTCQCP
>DQ012936|CD4*04|Homo sapiens|F|EX9|
HRFQKTCSPI
>CD4*04|Homo sapiens|F|EX1-EX9|Splicing A|complete|
MNRGVPFRHLLLVLQLALLPAATQGKKVVLGKKGDTVELTCTASQKKSIQFHWKNSNQIK
ILGNQGSFLTKGPSKLNDRADSRRSLWDQGNFPLIIKNLKIEDSDTYICEVEDQKEEVQL
LVFGLTANSDTHLLQGQSLTLTLESPPGSSPSVQCRSPRGKNIQGGKTLSVSQLELQDSG
TWTCTVLQNQKKVEFKIDIVVLAFQKASSIVYKKEGEQVEFSFPLAFTVEKLTGSGELWW
QAERASSSKSWITFDLKNKEVSVKRVTQDPKLQMGKKLPLHLTLPQALPQYAGSGNLTLA
LEAKTGKLHQEVNLVVMRATQLQKNLTCEVWGPTSPKLMLSLKLENKEAKVSKREKAVWV
LNPEAGMWQCLLSDSGQVLLESNIKVLPTWSTPVQPMALIVLGGVAGLLLFIGLGIFFCV
RCRHRRRQAERMSQIKRLLSEKKTCQCPHRFQKTCSPI*
>U47924|CD4*05|Homo sapiens|F|EX1|
MNRGVPFRHLLLVLQL
>U47924|CD4*05|Homo sapiens|F|EX2|[D1]|V-LIKE|
ALLPAATQGKKVVLGKKGDTVELTCTASQKKSIQFHWKNSNQIKILGNQGSFLTK
>U47924|CD4*05|Homo sapiens|F|EX3|[D1]|V-LIKE|
GPSKLNDRADSRRSLWDQGNFPLIIKNLKIEDSDTYICEVEDQKEEVQLLVFG
>U47924|CD4*05|Homo sapiens|F|EX4|[D2]|C-LIKE|
LTANSDTHLLQGQSLTLTLESPPGSSPSVQCRSPRGKNIQGGKTLSVSQLELQDSGTWTC
TVLQNQKKVEFKIDIVVL
>U47924|CD4*05|Homo sapiens|F|EX5|[D3]|V-LIKE|
AFQKASSIVYKKEGEQVEFSFPLAFTVEKLTGSGELWWQAERASSSKSWITFDLKNKEVS
VKRVTQDPKLQMGKKLPLHLTLPQALPQYAGSGNLTLALEAKTGKLHQEVNLVVMR
>U47924|CD4*05|Homo sapiens|F|EX6|[D4]|C-LIKE|
ATQLQKNLTCEVWGPTSPKLMLSLKLENKEAKVSKREKAVWVLNPEAGMWQCLLSDSGQV
LLESNIK
>U47924|CD4*05|Homo sapiens|F|EX7|
VLPTWSTPVQPMALIVLGGVAGLLLFIGLGIFFCVRCRHRR
>U47924|CD4*05|Homo sapiens|F|EX8|
RQAERMSQIKRLLSEKKTCQCP
>U47924|CD4*05|Homo sapiens|F|EX9|
HRFQKTCSPI
>CD4*05|Homo sapiens|F|EX1-EX9|Splicing A|complete|
MNRGVPFRHLLLVLQLALLPAATQGKKVVLGKKGDTVELTCTASQKKSIQFHWKNSNQIK
ILGNQGSFLTKGPSKLNDRADSRRSLWDQGNFPLIIKNLKIEDSDTYICEVEDQKEEVQL
LVFGLTANSDTHLLQGQSLTLTLESPPGSSPSVQCRSPRGKNIQGGKTLSVSQLELQDSG
TWTCTVLQNQKKVEFKIDIVVLAFQKASSIVYKKEGEQVEFSFPLAFTVEKLTGSGELWW
QAERASSSKSWITFDLKNKEVSVKRVTQDPKLQMGKKLPLHLTLPQALPQYAGSGNLTLA
LEAKTGKLHQEVNLVVMRATQLQKNLTCEVWGPTSPKLMLSLKLENKEAKVSKREKAVWV
LNPEAGMWQCLLSDSGQVLLESNIKVLPTWSTPVQPMALIVLGGVAGLLLFIGLGIFFCV
RCRHRRRQAERMSQIKRLLSEKKTCQCPHRFQKTCSPI*