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Threonine, an amino acid whose pI is 5.6, is shown below. What would be the overall charge for threonine at a pH of 5.6?

User Odieatla
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pI is called isoelectric point at which the amino acid is present as as Zwitter ion which contain equal positive and negative charges so the net charge on this amino acid will be Zero (Neutral)
User Oscar Del Ben
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