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Single Peptide Match
Multiple Peptide Match
UniProtKB release 2023_02 plus isoforms (249,918,932 sequences)

 Select sequence data set:
    a) All UniprotKB plus isoform sequences
Restrict by organism:
   Enter an organism from UniProt complete proteomes

   Select organisms from UniProt reference proteomes list
      [A] [B] [C] [DE] [FG] [H] [IJKL] [M] [NO] [PQ] [R] [S] [T] [UVWXYZ]

2. Insert multiple peptides, one per line, using single letter amino acid code (3 or more)
or in FASTA format below:


3. Options:
   a) UniProt/SwissProt only
    Yes    No

   b) Include Isoforms
    Yes    No

   c) UniRef100 representative sequences only
    Yes    No

   d) Treat Leucine (L) and Isoleucine (I) equivalent
    Yes    No

1. To improve the performance, please use small batch (i.e. < 500 peptides) each time, if you have large list of peptides.
2. Uploaded file must be in plain text format and one peptide per line.
3. Delays may be experienced due to heavy loads on our server or network traffic.

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