EMBL WWW Gateway to Isoelectric Point Service

Isoelectric Point determination

Reference: Lehninger (1979) Biochimie

Enter your sequence

Example:

QWERTYYTREWQRTYEYTRQWE

Please NOTE: This tool understands ONLY UPPERCASE LETTERS as input. Lowercase letters are simply NOT taken into account at all when calculating the PI. The AA contributing to the isoelectric point (in this calculation) are: C, D, E, H, K, R and Y (and the Amino- and Carboxy-Terminus of the peptide)

Author: Toldo@embl-heidelberg.de Last Updated: Wednesday, 7 June 1995