Fluorescent micrographs of the condensation process of collagen fibrils by populated fibroblasts.

<p>TIG-1 cells were cultured in FITC-labeled collagen gels (0.7 mg/mL). The populated cells were seen as completely black objects (arrowheads). Each time is shown at the upper left of the corresponding micrograph. FITC-labeled collagen fibers were condensed into the area surrounding the cell. Bar: 50 µm.