Question

why do amino acids change their structure in different pH

Answer 1

amino acid has a basic amine group and an acidic carboxylic acid group. This structure internally transfers a hydrogen ion from COOH group to amine group leaving positive and negative charges on both. Such a structure is called a zwitter ion. Hence due to change in pH the structure of the amino acids changes

Answer 2

Amino acid change their structure in different pH as the structure of the amino acid consists of a basic amine group and an acidic carboxylic acid group. This structure internally transfers a hydrogen ion from the COOH group to the amine group resulting in negative and positive ions on both of it. The changed structure is termed as zwitterion. As the change in pH alters the structure of the amino acids.

Explanation:

• A zwitterion is a composite which does not have overall electrical charge,  

• It contain both positive and adverse charged which causes a change in structure.

• As the pH is altered the zwitterion being charged with the positive and negative ions can readily pick up hydrogen ions from the solution and changes internally their structure. Hence, due to alter in pH, the structure of the amino acids changes with it.

• At different pH, the structures of amino acids change in structure as their are the −NH2 and −COOH groups ions.

Learn more about it:

Amino acids exists as zwitterionic form.give its structure.why is it formed?

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What is ionizable nature of the nh2 and cooh group? why does in solutions of different ph the structure of amino acid changes accordingly?

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