Which of the following statements is correct concerning the isoelectric point of

ID: 1080747 • Letter: W

Question

Which of the following statements is correct concerning the isoelectric point of histidine?

Histidine has no net charge around pH 7.58, where the -amino group is deprotonated but the imidazole group is protonated. The amino acid carries a net charge at all pH. Histidine has no net charge around pH 7.58, where the imidazole group is deprotonated but the -amino group is protonated. Histidine has no net charge around pH 7.58, where the -carboxyl group is protonated, and the side-chain imidazole group and the -amino group are deprotonated. Histidine has no net charge around pH 1.80, where the -carboxyl group.

Explanation / Answer

As at the isoelectric point the net charge of the molecule is zero .So the net charge of the histdine is zero if the alpha carboxyl group is protonated and the imidazole group is deprotonated.

so the answer will be c.

histidine has no net charge around pH 7.58,where the alpha carboxyl group is protonated but the side chain imidazole is deprotonated.

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Which of the following statements is correct concerning the isoelectric point of

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Which of the following statements is correct concerning the isoelectric point of

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