Electron microscopic study of the process of DNA ejection from the head of PL-1, a Lactobacillus casei phage

The process of DNA ejection from the head of PL-1, a Lactobacillus casei ATCC 27092 phage, was studied by electron microscopy by counting the number of ghost particles with empty heads among phages already adsorbed to the cell. The process of DNA ejection was temperature- and live cell-dependent.