I have a mixture of goat serum / plasma that I attempted to ammonium sulfate precipitate (using pooled samples) to get out the immunoglobulins. I dialyzed in PBS afterwards, but when placed in the fridge, it became a jelly-like substance. As this will need to be stored in the fridge for further uses, how can I stop the mixture from turning jelly-like? Also, how do I fix / revert the jelly-like solution back to liquid?