How many functional groups does the peptide MDFGRKCDE have that can be titrated?
8
The peptide MDFGRKCDE has a total of three functional groups that can be titrated. These functional groups include the -carboxyl group (-COOH) of the C-terminal amino acid, the -amino group (-NH2) of the N-terminal amino acid, and the sidechain of the amino acid residue lysine (K), which has a -NH3+ group that can be titrated. The remaining amino acid residues in the peptide do not have any titratable functional groups.
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