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What chemical aspect of amino acids results in their having different properties such that the chemical and physical properties of polypeptides vary with both amino acid content and amino acid order?

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Sounds like a homework question to me. – Chinmay Kanchi May 24 '13 at 5:08
What differences do the amino acids have from one another? There is your answer. – Kevin May 24 '13 at 23:27
Look up amino acid R groups. – James Dec 4 '14 at 2:15

Sounds seriously like your homework, so it'd be better if you researched. However as a starting point amino acids can be polar and non-polar. These properties cause varying forces of attraction between amino acids and their surrounding environment. The location changes the way they can interact. Ask if you are unsure about something :)

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