62 BACTERIOPHAGES 



particles. These substances, as well as thymol and chloroform, 

 can be used to kill or inhibit bacteria and molds in the prepa- 

 ration and preservation of phage stocks. 



Several protein denaturants, as well as osmotic shock, can be 

 used to liberate nucleic acid from phage particles. Osmotic 

 shock also permits isolation of the proteinaceous ghost of certain 

 phages in relatively undamaged form. 



