Well, trios phosphate, isomerase trios, because these are triosis and they contain phosphate groups, one each. And so trio's, phosphate, isomerase basically converts this DHAP, the dihydroxy acetone phosphate, into the glyceroaldehyde three phosphate. And once stage two takes place, we essentially took so the net result of stage two is we took the fructose one six bisphosphate and we cleaved it into two identical three carbon molecules, these gap molecules. So let's move on to stage three. So essentially, in this stage, I've only listed the reactions for a single gap molecule. But you should know that all these steps actually take place twice because we have these two molecules that were formed in stage two.