Gallery A gallery of scientific pictures, lab events, and other interesting stuff. Two-bead microrheology with whole cells. Differential interference contrast microscopy (DIC) image of a MLO-Y4 osteocyte-like cell suspended in culture medium by two optically trapped fibronectin-coated beads (diameter 4 µm). The beads are attached to opposing sides of the cell. Scale bar: 5 µm.