An electrostatic interaction might occur within a protein between which of the following amino acid pairs at typical physiological pH?
A) Ser/Asn
B) Asp/Glu
C) Arg/Cys
D) Lys/Asp
E) Val/Ile

Question

Quizplus · Accepted Answer

Lysine has a positively charged side chain at physiological pH, while aspartic acid has a negatively charged side chain. Therefore, a strong electrostatic interaction may occur between Lys and Asp amino acids within a protein at typical physiological pH.

An Electrostatic Interaction Might Occur Within a Protein Between Which