Now, in biochemistry, we use something called the oxygen binding curve, also known as the oxygen dissociation curve, to basically describe the properties of myoglobin and hemoglobin. And this is the graph shown on the board. So the blue curve basically describes the myoglobin oxygen binding curve, while the red curve describes the hemoglobin oxygen binding curve. So going this way, it's a binding curve, going backwards, it's a dissociation curve. And so we can use O two binding curve or O two dissociation curve interchangeably. These two terms mean the same exact thing.