And so at a physiological PH of around seven, these two groups will exist in their deprotonated state. And these two groups are known as the carboxylate ion groups. And so they will bear a full negative charge. And that full negative charge will be delocalized among these two electronegative oxygen atoms. And that will be a stabilizing effect now, the only difference between these two amino acids is in this particular case, we have an extra carbon. In this case, we have one less carbon, as in this case.