isoelectric point

noun

, Chemistry.

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

isoelectric point

noun

1. biochem the pH value at which the net electric charge of a molecule, such as a protein or amino acid, is zero

Word History and Origins

Origin of isoelectric point¹

First recorded in 1895–1900

Example Sentences

To promote the formation of new disulfide bonds, that value, known as the isoelectric point, has to match the pH of hair keratin.

From Science Magazine

She and her colleagues wondered if they could change a protein’s isoelectric point to make it mesh better with keratin’s pH value.

From Science Magazine

Next, they added this substance to a chemical soup called EDDAC, raising its isoelectric point.

From Science Magazine