KDR/VEGFR2
KDR/VEGFR2 — the molecular target that 1 compounds in the wiki act on.
In one line: The "grow new blood vessels" receptor that the healing peptide BPC-157 switches on.
KDR (also called VEGFR2) is the main receptor for growing new blood vessels. That matters for healing, because injured tissue can only repair if it gets a fresh blood supply. The peptide BPC-157 appears to switch this receptor on, driving new vessel growth to tendons, gut, and muscle — which is why it shows such striking healing in animal studies.
The honest catch: almost all of that evidence is in rats. In humans it's largely unproven, and growing new blood vessels is also something tumours do — a theoretical caution.