Liquid Nitrogen Cryo-Impacting: a New Concept for Cell Disruption

High-efficiency disruption of bacteria can be accomplished in 2 or more min by the new procedure of liquid nitrogen cryo-impacting. Release of the dipicolinic acid-Ca 2+ chelate paralleled the breakage of Bacillus megaterium endospores. Lactate dehydrogenase activity was much better in supernates from liquid nitrogen cryo-impacting-broken Escherichia coli cells than in those from sonically treated and broken E. coli cells.