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) 
>AJ251433|MH2-DA*01|Oncorhynchus mykiss|F|EX1|splincing a|complete|
MKTSMIVLILCCQVYA
>AJ251433|MH2-DA*01|Oncorhynchus mykiss|F|EX2|[D1]|G-ALPHA-DOMAIN|splincing a|complete|
DKVLHIDLAITGCSDSDGVDMYGLDGEELWYADFNKKEGVMALPPFADQMTFPGFYEQAV
GNLGICKANLAVAIKASKNPP
>AJ251433|MH2-DA*01|Oncorhynchus mykiss|F|EX3|[D2]|C-LIKE-DOMAIN|splincing a|complete|
AIAPPHSSIYPRDDVELGVENTLICHVSAFHPAPVRVRWTRNNQNVTEGVRLSTPYPNTD
FTLNQFSSLTFTPEEGDIYGCTVEHKALTEPLTRIWEPEV
>AJ251433|MH2-DA*01|Oncorhynchus mykiss|F|EX4|splincing a|complete|
QPSVAPAVFCGVGLTLGLLGVATGTFFPYRSLLWLRALCS
>AJ251433|MH2-DA*01|Oncorhynchus mykiss|F|EX1-4|splincing A|protein isoform A|complete|
MKTSMIVLILCCQVYAEDKVLHIDLAITGCSDSDGVDMYGLDGEELWYADFNKKEGVMAL
PPFADQMTFPGFYEQAVGNLGICKANLAVAIKASKNPPEAIAPPHSSIYPRDDVELGVEN
TLICHVSAFHPAPVRVRWTRNNQNVTEGVRLSTPYPNTDFTLNQFSSLTFTPEEGDIYGC
TVEHKALTEPLTRIWEPEVSQPSVAPAVFCGVGLTLGLLGVATGTFFPYRSLLWLRALCS