Amino acid side chain: why is an amino group basic and a hydroxyl group not?

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This topic contains 1 reply, has 0 voices, and was last updated by  Ethon 12th May 2018 at 8:53 am.

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    Ethon
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    Hi all

    I don’t really understand this… How come that if an amino group is attached to the amino acid side chain, like in arginine or lysine, the molecule is basic, but if an hydroxyl group is attached, like threonine, it is not basic?

    How come the amino group can accept a H+ and a hydroxyl group cannot?

    Thanks

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