Now, under certain conditions, these two reactants will react, and they will produce the following product. Now, product C is a dipeptide, and a dipeptide simply means we have two amino acids connected by a peptide bond that is shown in green. So this carbon on product C is this carbon on reactant A, and this nitrogen on product C is this nitrogen on reactant B. So basically, this carbon forms a bond with this nitrogen shown in green, and that is our peptide bond between these two amino acids A and B. Now, whenever we react a certain type of reactants, and whenever a chemical reaction takes place, we know that the number of atoms is always conserved because we have the conservation of mass. Now, let's take a look at this carbon and then compare to this carbon.