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Coliphage Ghosts Obtained by Osmotic Shock or LiCl Treatment are Devoid of J- and H-Gene Products

Department of Biochemistry University of Gdansk, 24 Ktadki, 80-822 Gdask, Poland

We have proved by acrylamide gel electrophoresis that DNA-free ghosts of bacteriophage obtained by osmotic shock (S-ghosts), or by incubation in 5 M-L-Cl (L-ghosts) do not possess the proteins specified by the genes J and H. Electron microscopy of L-ghosts showed that they are devoid of the whole tail tip, composed of the basal part and the tail fibre. The lack of the J-gene product, which is believed to be the tail fibre, explains why S- and L-ghosts do not adsorb to susceptible bacteria. Our results suggest that the H-gene product, which is modified after translation, is situated in the basal part of the tail.

Received 30 October 1978; accepted 5 February 1979.

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