Figure 3.

Distribution of fluorescent microbeads in the lung. Microbeads (3.2 μm) injected in the jugular vein were detected in the lung by fluorescence microscopy. Few microbeads were in the lungs of control mice (A). In contrast, numerous fluorescent beads were observed 4 days after removal from doxycycline (B). Figure is representative of n = 6/group. Scale bar = 100 μm.