Tripeptide aldehyde. Reversible competitive inhibitor of serine and cysteine proteases. Inhibits also phospholipase D and C activation in rat hepatocytes.
The tripeptide Arginyl-Glycyl-Aspartic acid (RGD) is a common cell recognition site of many adhesive proteins contained in extracellular matrices and in the blood .
And then the body recognizes the presence of those dipeptides and tripeptides, so little groups of twos or three peptides, not just one, and sends those selectively to the skin.