Migration of FDCP-mix cells on ECM at 400× original magnification. Ten thousand cells were inoculated into 96-well plate cultures onto (A) BSA and (B) Fn-coated surface, IL-3 was added at 10 U/mL and cultures were kept at a near vertical position overnight. Cultures were then tilted at 15° towards the top end of the pictures and migration was documented photographically after 24 hours. A representative experiment is shown for each condition.