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Sequence Manipulation Suite

Protein Isoelectric Point

Protein Isoelectric Point calculates the theoretical pI (isoelectric point) for the protein sequence you enter. Use Protein Isoelectric Point when you want to know approximately where on a 2-D gel a particular protein will be found.

Paste the raw sequence or one or more FASTA sequences into the text area below. Input limit is 200000 characters.

  • Add copies of to the above sequence.
  • Use pK values from