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A Lack of Inhibitory Action of Bacteriophage T4 Ghosts in the presence of EDTA

Rieko Yonemoto

Institute for Protein Research Osaka University, Suita, Osaka and Institute for Plant Virus Research, 959 Aoba-cho, Chiba, Japan

Adsorption of bacteriophage T4 ghosts on to Escherichia coli cells has been known to cause a dramatic change in the cellular metabolism, the effect being similar to that of colicin K. It is shown here that the inhibitory activity of ghosts is not expressed either at 0 °C in the ordinary media (like colicin K) or even at 30 °C in a medium containing EDTA, in contrast to colicin K.

Since the process of sheath contraction of T4 phage is blocked by EDTA, it is suggested that the adsorbed ghosts may not exert their inhibitory activity until sheath extraction occurs.

^* Present address: Department of Botany, Faculty of Science, Kyoto University, Kyoto, Japan.

Present address: Department of Bacteriology, Nippon Dental College, 1-9-20, Fujimi, Chiyoda-ku, Tokyo, Japan.

Received 19 June 1975; accepted 24 September 1975.