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. Now, when we are below the PTA value of 4.7, or actually, when we are below the PH value of 4.7, these are going to be protonated. Now, when this is protonated, we no longer call it aspartate. We call it aspartic acid.