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    can only one of the nh2 be protonated in zwitterions?
    so do all the nh2 become protonated in acidic conditions?
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    (Original post by esmeralda123)
    can only one of the nh2 be protonated in zwitterions?
    so do all the nh2 become protonated in acidic conditions?
    Yes, although there degree of protonation at any given pH will most likely be different.
 
 
 

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