Fig. 1. A schematic representation of the cell attachment assay (A) and the attachment of cells to CSPE-coated substratum in this assay (B). When cells were plated onto adhesive- or 5 µg/ml CSPE-coated wells, they remained attached to the entire bottom of the well after the centrifugation. When cells were plated onto non-adhesive protein, BSA (10 mg/ml), the centrifugation formed a small pellet of cells at the bottom of the well.