Immunofluorescence CD105/CD31 double-staining of normal mouse lung, fLuc-4T1 tumor-bearing lung, liver, spleen, and kidney tissue sections. TRC105 and AlexaFluor488-labeled goat anti-human IgG were used for CD105 staining (green). Afterwards, the tissue slices were stained with rat anti-mouse CD31 antibody and Cy3-labeled donkey anti-rat IgG (red). Magnification: 200×. Scale bar: 50 µm.