3.4.21.46 cytoplasm is mainly expressed in the cytoplasm of tumor cells 5737 695580 3.4.21.46 cytoplasm PDGF-D is expressed uniformly in the cytoplasm of medial smooth muscle cells of the arteries and variably by some adventitial cells. PDGF-D expression is present in the epithelial cytoplasm of some, but not all, distal tubules and collecting ducts and in podocytes 5737 698194 3.4.21.46 additional information occasionally in peritumoral stroma - 695580