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Topic: Arginine - Charge at different pH  (Read 9414 times)

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Offline pretzalisa

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Arginine - Charge at different pH
« on: September 21, 2009, 09:48:09 AM »
Is the charge on arginine the same in pH7 as in pH3?
Not sure... but i was thinking they would both be the same (protinated) as both pHs are below pI??

Thanks
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Offline Yggdrasil

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Re: Arginine - Charge at different pH
« Reply #1 on: September 21, 2009, 11:51:38 AM »
A good way to approach this problem would be to list out the pKa values of the three acid/base groups on arginine.
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Offline zhangbo2007

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Re: Arginine - Charge at different pH
« Reply #2 on: September 21, 2009, 12:59:24 PM »
In fact, the positive charge on protonated arginine differs at different pH.
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