And tripeptide means we have three peptide bonds, so we have two peptide bonds, so we have three amino acids within that peptide. So all proteins are digested by proteolytic enzymes into either amino acid constituents or dipeptides and tripeptides. And the interrogate, the cell found in the small intestine is actually capable of absorbing, not only these individual amino acids, but also our dipeptides and tripepptides. But the pathway by which our cell absorbs these differs. So it differs from amino acids and dipeptides and tripeptides, as we'll see in just a moment. So individual amino acids are absorbed by the intercity using the sodium dependent co transport system.