And one of these pathways is known as the glucose alanine cycle. And this will be the focus of this lecture. So let's suppose we are fasting. Eventually, we begin to break down the branch chain amino acids into the carbon scale intermediates, and then we form ammonium as a byproduct. Now, ammonium must be transformed into some other molecules. So we must have some type of carrier molecule that ultimately transports through the blood to the liver.