CRYOPRESERVABLE CELL SCAFFOLD MATERIAL

摘要

The present invention provides a cryopreservative agent which enables the three-dimensional culture of cells. The present invention provides a hydrogel produced by the intermolecular crosslinking of an amphoteric electrolyte polymer in a physiological solution so that the amphoteric electrolyte polymer can be immobilized in the physiological solution that serves as a dispersion medium, wherein the amphoteric electrolyte polymer has both an amino group and a carboxyl group in the molecule and has a ratio of the content of the carboxyl group to the content of the amino group (i.e., a (carboxyl group)/(amino group) ratio) ranging from 0.45/0.55 to 0.95/0.05.