Well, the only difference lies in this group here. So glutamate looks like this, but glutamine has this amino group attached onto this carbon instead of an oxygen. And so ultimately, we basically want to once again eliminate this amino group. So we want to eliminate ammonium, and we want to attach an oxygen. And so this is catalyzed by glutaminase, which uses water to basically remove this ammonium, and we form this oxygen as shown in this molecule. So we form our glutamate.