Fig. 2

QCM-D frequency and dissipation versus time curves for 3T3 cells added to surfaces modified by collagen I (0 < t < 13 min) and exposed to CO₂ independent medium containing 10 % CS (18 < t < 30 min). The protein coated surfaces were subjected to (A) cell seeding, (B) cell attachment, and (C) cell spreading (these regimes were assigned by real-time microsopy), after which the effect of (D) the addition of cytochalasin D (2 μg/ml) followed by (D′) rinsing with medium leading to cell recovery was monitored. The 3rd (line), 5th (circle), and 7th (triangle) overtones are shown