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OpenStudy (anonymous):

Are cytosine and Tyrosine the only amino acids that are ionized R-group chains at pH of 7?

OpenStudy (anonymous):

open organic chemistry text book and in index search amino acids and read about them, i cant remember on top of my head, your best bet is to google for pKa/pH neutral values then compare them to pH of human body

OpenStudy (anonymous):

email your professor they always help

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