Distributions of plasminogen and uPA in day-13 QPD cultured megakaryocytes compared with platelets. Deconvolved immunofluorescent images of QPD platelets (Q plt) and QPD megakaryocytes (Q MK) grown with plasma. Cells were double immunolabeled with antibodies to uPA (red) and plasminogen (Pg, green; merged images at right). Experiments were performed as outlined in “Immunofluorescent microscopy.”