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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) 
>M91646|FCGR1B*01|Homo sapiens|F|EX1|
MWFLTTLLLW
>M91646|FCGR1B*01|Homo sapiens|F|EX2|
PVDGQV
>M91646|FCGR1B*01|Homo sapiens|F|EX3|[D1]|C-LIKE|
TTKAVITLQPPWVSVFQEETVTLHCEVLHLPGSSSTQWFLNGTATQTSTPSYRITSASVN
DSGEYRCQRGLSGRSDPIQLEIHR
>M91646|FCGR1B*01|Homo sapiens|F|EX4|[D2]|C-LIKE|
WLLLQVSSRVFMEGEPLALRCHAWKDKLVYNVLYYRNGKAFKFFHWNSNLTILKTNISHN
GTYHCSGMGKHRYTSAGISQYTVK
>M91646|FCGR1B*01|Homo sapiens|F|EX5|[D3]|C-LIKE|
LFPAPVLNASVTSPLLEGNLVTLSCETKLLLQRPGL*
>M91646|FCGR1B*01|Homo sapiens|F|
MWFLTTLLLWVPVDGQVDTTKAVITLQPPWVSVFQEETVTLHCEVLHLPGSSSTQWFLNG
TATQTSTPSYRITSASVNDSGEYRCQRGLSGRSDPIQLEIHRGWLLLQVSSRVFMEGEPL
ALRCHAWKDKLVYNVLYYRNGKAFKFFHWNSNLTILKTNISHNGTYHCSGMGKHRYTSAG
ISQYTVKELFPAPVLNASVTSPLLEGNLVTLSCETKLLLQRPGL*
>L03419|FCGR1B*01|Homo sapiens|F|EX1|splicingB
MWFLTTLLLW
>L03419|FCGR1B*01|Homo sapiens|F|EX2|splicingB
PVDGQV
>L03419|FCGR1B*01|Homo sapiens|F|EX3|[D1]|C-LIKE|splicingB
TTKAVITLQPPWVSVFQEETVTLHCEVLHLPGSSSTQWFLNGTATQTSTPSYRITSASVN
DSGEYRCQRGLSGRSDPIQLEIHR
>L03419|FCGR1B*01|Homo sapiens|F|EX4|[D2]|C-LIKE|splicingB
WLLLQVSSRVFMEGEPLALRCHAWKDKLVYNVLYYRNGKAFKFFHWNSNLTILKTNISHN
GTYHCSGMGKHRYTSAGISQYTVK
>L03419|FCGR1B*01|Homo sapiens|F|EX6|[D4]|splicingB
LQLPTPVWFHVLFYLAVGIMFLVNTVLWVTIRKELKRKKKWNLEISLDSGHEKKVISSLQ
EDRHLEEELKCQEQKEEQLQEGVHRKEPQGAT*
>L03419|FCGR1B*01|Homo sapiens|F|splicingB
MWFLTTLLLWVPVDGQVDTTKAVITLQPPWVSVFQEETVTLHCEVLHLPGSSSTQWFLNG
TATQTSTPSYRITSASVNDSGEYRCQRGLSGRSDPIQLEIHRGWLLLQVSSRVFMEGEPL
ALRCHAWKDKLVYNVLYYRNGKAFKFFHWNSNLTILKTNISHNGTYHCSGMGKHRYTSAG
ISQYTVKGLQLPTPVWFHVLFYLAVGIMFLVNTVLWVTIRKELKRKKKWNLEISLDSGHE
KKVISSLQEDRHLEEELKCQEQKEEQLQEGVHRKEPQGAT*