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Under most biological conditions, however, histidine is considered to be a triprotic acid. This is due to the pKa of the _________ being ___________.A. nitrogen in the imidazole ring possessing a hydrogen but no charge; much lower than the pH values normally found in a cellB. nitrogen in the imidazole ring possessing a hydrogen but no charge; much higher than the pH values normally found in a cellC. carboxylic acid; much lower than the pH values normally found in a cellD. carboxylic acid; much higher than the pH values normally found in a cell

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Nitrogen in the imidazole ring possesses hydrogen but no charge; much lower than the pH values typically found in a cell.

Is imidazole acidic or basic?

Imidazole is amphoteric; it can act as both acid and base. The compound is classified as aromatic due to the presence of π-electrons, consisting of a pair of electrons from the protonated nitrogen atom and one from each of the remaining four atoms of the ring.

What is the function of imidazole?

Imidazole is used as a competitive agent for the release of histidine-containing proteins. In addition, imidazole can be added in low concentrations in the sample and binding buffer to reduce the binding of contaminant proteins, thus increasing the final purity.

Learn more about Imidazole here: brainly.com/question/12851463

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