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IMGT reference sequences in FASTA format:

Nucleotide 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) 
>M12728|CD3D*01|Mus musculus|F|EX1|
atggaacacagcgggattctggctagtctgatactgattgctgttctcccccaag
>M12729|CD3D*01|Mus musculus|F|EX2|[D]|C-LIKE|
ggagccccttcaagatacaagtgaccgaatatgaggacaaagtatttgtgacctgcaata
ccagcgtcatgcatctagatggaacggtggaaggatggtttgcaaagaataaaacactca
acttgggcaaaggcgttctggacccacgagggatatatctgtgtaatgggacagagcagc
tggcaaaggtggtgtcttctgtgcaagtccattaccgaa
>M12729|CD3D*01|Mus musculus|F|EX3|
tgtgccagaactgtgtggagctagactcgggcaccatggctggtgtcatcttcattgacc
tcatcgcaactctgctcctggctttgggcgtctactgctttgcaggacatgagaccggaa
ggccttctgggg
>M12729|CD3D*01|Mus musculus|F|EX4|
ctgctgaggttcaagcactgctgaagaatgagcagctgtatcag
>M12729|CD3D*01|Mus musculus|F|EX5|
cctcttcgagatcgtgaagatacccagtacagccgtcttggagggaactggccccggaac
aagaaatct
>CD3D*01|Mus musculus|F|EX1-EX5|Splicing A|complete|
atggaacacagcgggattctggctagtctgatactgattgctgttctcccccaagggagc
cccttcaagatacaagtgaccgaatatgaggacaaagtatttgtgacctgcaataccagc
gtcatgcatctagatggaacggtggaaggatggtttgcaaagaataaaacactcaacttg
ggcaaaggcgttctggacccacgagggatatatctgtgtaatgggacagagcagctggca
aaggtggtgtcttctgtgcaagtccattaccgaatgtgccagaactgtgtggagctagac
tcgggcaccatggctggtgtcatcttcattgacctcatcgcaactctgctcctggctttg
ggcgtctactgctttgcaggacatgagaccggaaggccttctggggctgctgaggttcaa
gcactgctgaagaatgagcagctgtatcagcctcttcgagatcgtgaagatacccagtac
agccgtcttggagggaactggccccggaacaagaaatcttaa