Zwitter Ion: Difference between revisions
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A Zwitter Ion is formed when an amino acid is at it's [[Isoelectric point|isoelectric point]]. Most Zwitter ion's have no net charge, and therefore will not migrate in a charged field, it has both accepted a proton (H<sup>+</sup>) at it's N-terminus and lost a proton at it's C-terminus. However, it is possible for the [[R-group|R-group]] of an amino acid to interact in the same way, which can give the Zwitter ion a net charge eg. if the R-group contains a carboxyl group (COOH) it may also donate the H<sup>+ </sup>from this group, creating a net charge of +1. | A Zwitter [[Ions|Ion]] is formed when an [[amino acid|amino acid]] is at it's [[Isoelectric point|isoelectric point]]. Most Zwitter ion's have no net charge, and therefore will not migrate in a charged field, it has both accepted a proton (H<sup>+</sup>) at it's N-terminus and lost a proton at it's [[C-terminus|C-terminus]]. However, it is possible for the [[R-group|R-group]] of an amino acid to interact in the same way, which can give the Zwitter ion a net charge eg. if the R-group contains a carboxyl group (COOH) it may also donate the H<sup>+ </sup>from this group, creating a net charge of +1. | ||
Revision as of 11:56, 22 November 2011
A Zwitter Ion is formed when an amino acid is at it's isoelectric point. Most Zwitter ion's have no net charge, and therefore will not migrate in a charged field, it has both accepted a proton (H+) at it's N-terminus and lost a proton at it's C-terminus. However, it is possible for the R-group of an amino acid to interact in the same way, which can give the Zwitter ion a net charge eg. if the R-group contains a carboxyl group (COOH) it may also donate the H+ from this group, creating a net charge of +1.