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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) 
>AF287008|TREM1*01|Homo sapiens|F|EX1
ATGAGGAAGACCAGGCTCTGGGGGCTGCTGTGGATGCTCTTTGTCTCAG
>AF287008|TREM1*01|Homo sapiens|F|EX2|[D]|V-LIKE
AACTCCGAGCTGCAACTAAATTAACTGAGGAAAAGTATGAACTGAAAGAGGGGCAGACCC
TGGATGTGAAATGTGACTACACGCTAGAGAAGTTTGCCAGCAGCCAGAAAGCTTGGCAGA
TAATAAGGGACGGAGAGATGCCCAAGACCCTGGCATGCACAGAGAGGCCTTCAAAGAATT
CCCATCCAGTCCAAGTGGGGAGGATCATACTAGAAGACTACCATGATCATGGTTTACTGC
GCGTCCGAATGGTCAACCTTCAAGTGGAAGATTCTGGACTGTATCAGTGTGTGATCTACC
AGCCTCCCAAGGAGCCTCACATGCTGTTCGATCGCATCCGCTTGGTGGTGACCAAGG
>AF287008|TREM1*01|Homo sapiens|F|EX3
GTTTTTCAGGGACCCCTGGCTCCAATGAGAATTCTACCCAGAATGTGTATAAGATTCCTC
CTACCACCACTAAGGCCTTGTGCCCACTCTATACCAGCCCCAGAACTGTGACCCAAGCTC
CACCCAAGTCAACTGCCGATGTCTCCACTCCTGACTCTGAAATCAACCTTACAAATGTGA
CAGATATCATCAG
>AF287008|TREM1*01|Homo sapiens|F|EX4
GGTTCCGGTGTTCAACATTGTCATTCTCCTGGCTGGTGGATTCCTGAGTAAGAGCCTGGT
CTTCTCTGTCCTGTTTGCTGTCACGCTGAGGTCATTTGTACCCTAG
>AY074783|TREM1*01|Homo sapiens|?|EX1|splicing B
ATGAGGAAGACCAGGCTCTGGGGGCTGCTGTGGATGCTCTTTGTCTCAG
>AY074783|TREM1*01|Homo sapiens|?|EX2|[D]|V-LIKE|splicing B
AACTCCGAGCTGCAACTAAATTAACTGAGGAAAAGTATGAACTGAAAGAGGGGCAGACCC
TGGATGTGAAATGTGACTACACGCTAGAGAAGTTTGCCAGCAGCCAGAAAGCTTGGCAGA
TAATAAGGGACGGAGAGATGCCCAAGACCCTGGCATGCACAGAGAGGCCTTCAAAGAATT
CCCATCCAGTCCAAGTGGGGAGGATCATACTAGAAGACTACCATGATCATGGTTTACTGC
GCGTCCGAATGGTCAACCTTCAAGTGGAAGATTCTGGACTGTATCAGTGTGTGATCTACC
AGCCTCCCAAGGAGCCTCACATGCTGTTCGATCGCATCCGCTTGGTGGTGACCAAGG
>AY074783|TREM1*01|Homo sapiens|?|EX3|splicing B
GGTTCCGGTGTTCAACATTGTCATTCTCCTGGCTGGTGGATTCCTGA