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Why does Glutamate say there is an "NH2" group but the model below shows three hydrogen?
02-23-2014, 12:26 AM
Post: #1
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Why does Glutamate say there is an "NH2" group but the model below shows three hydrogen?
http://en.wikipedia.org/wiki/Glutamate

The image at the top right has an "NH2" group but the picture just below shows 3 hydrogen projecting from the Nitrogen.
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02-23-2014, 12:32 AM
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The model represents the structure of the ZWITTER ion of the molecule, formed by H^+ transferring from the OH group leaving it with a 1- charge to the NH2 group using this groups lone pair of electrons and forming a coordinate bond and an NH3^+ group.

This is a common occurrence in amino acids. A twitter ion is a molecule with overall neutrality but with + and - charged parts.
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