So we have amino acid number one, amino acid number two that are connected by this peptide bond, which we're going to draw in the following manner to basically designate the fact that this is more of a double bond than it is a single bond. And what that means is now we have cyst, trans isomerism. So in this particular case, as the case is in all of these peptide bonds, we have a transconfiguration. And what that means is this alpha carbon points in the opposite direction with respect to this alpha carbon. So they point away. Now, what this diagram tells us is if this is the Y axis, it describes the energy.