During the extracellular proteolytic activation of PDGF-C and PDGF-D chains, the CUB domains is removed and plasmin protease has been shown to proteolytically cleave within the hinge regions, and thus releasing the corresponding growth factor domains. In addition the protease tissue-type plasminogen activator (tPA) is also involved in the activation of PDGF-CC but not able to cleave and activate PDGF-DD.
Fredriksson, L, Li, H, Eriksson, U
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