So we know that the glycine tryptophan and then we have arginine. So this must be attached here. And because the tyrosine is attached to our arginine, we have glycine tryptophan, arginine, tyrosine. Now, the next question is what do we put at the tyrosine? Well, let's go back to this diagram here, to this experiment number one. So we have tyrosine appearing essentially right over here.