So this is arginine, which is the same arginine as we have here. Now, in this case, nothing is attached onto this arginine. But in this case, we have tyrosine attached to this arginine. 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.