Fig. 5. Laminin matrix organization of AECs maintained on a deformable substrate in vitro. AECs, maintained for 4 days on elastomer membranes, were prepared for confocal indirect immunofluorescence microscopy using antibodies against the 3 laminin subunit (A). Notice the fibrillar arrays of matrix proteins recognized by the antibodies. (B) Phase-contrast image of the cells shown in A. Bar, 10 µm.