TERMIUM Plus®

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ISOELECTRIC PH [1 record]

Record 1 2003-10-20

English

Subject field(s)
  • Biological Sciences
  • Molecular Biology
DEF

The pH at which a substance is electrically neutral or at which it is at its minimum ionization.

DEF

The pH at which a molecule (usually an amino acid of protein) has no net charge and will not move in an electric field.

OBS

Iso-electric focusing: A technique for separating proteins according to their iso-electric points. The mixture of proteins is placed in a pH gradient established by ampolines in an electric field across a liquid or a gel matrix; the proteins move in the electric field until they reach their iso-electric points in the pH gradient where, having lost net charge, they are focused.

French

Domaine(s)
  • Sciences biologiques
  • Biologie moléculaire
OBS

Le point isoélectrique est à distinguer du point iso-ionique caractérisé par l'égalité du nombre des charges positives et négatives portées par la molécule, bien que ces deux points soient très proches et habituellement confondus.

Spanish

Campo(s) temático(s)
  • Ciencias biológicas
  • Biología molecular
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