why-is-it-important-to-use-the-correct-set-of-pka-values-for-amino-acid-residues

Question

Why is it important to use the correct set of pKa values for amino acid residues instead of free amino acids when calculating the net charge of a peptide?

Accepted Answer

Because the microenvironment can shift pKa values, affecting charge calculations.

Answer

Because the pKa values for residues are always lower.

Answer

Because the pKa values for residues are always higher.

Answer

Because free amino acids do not have ionizable groups.