Hydrogel Reversibility. Time resolved confocal scan of 15 μm spheres suspended in situ with pH and enzyme triggered reversing. Color indicates time; red is the start time, green is at 5 minutes, blue is at 10 minutes. Lack of color differentiation indicates limited mobility.
Liebmann et al. BMC Biotechnology 2007 7:88 doi:10.1186/1472-6750-7-88