Question: 3. Given the pka's for the 20 common amino acids (see text), at physiological pH (7.4) what would be the charge on the R (side)-groups

3. Given the pka's for the 20 common amino acids (see text), at physiological pH (7.4) what would be the charge on the R (side)-groups of arginine, glutamic acid, leucine and proline? 4. Why is considered the most basic amino acid

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