Phy ten methylene tetrahydrophoblate basically undergoes a reaction that is catalyzed by serine hydroxy methyl transferase. And so what this enzyme does is it ultimately transfers this group here, shown in blue, as well as uses the water molecule to actually attach that hydroxide group onto glycine. So ultimately, we attach a hydroxy methyl group onto the glycine to form our serene. And so then the serine, we actually also form the THF, the tetrahydrophobate, and then the serene basically follows the steps that we have on the board. Now, what about the last one, three anine. So, three anine can be transformed into pyruvate via an intermediate molecule known as two amino, three ketobutyrate.