1887

Abstract

This communication deals with the detailed morphology, buoyant density, and chemical composition of phage XP5 (Mandell & Eisenstark, 1953).

In agreement with earlier descriptions (Thornberry, Eisenstark & Anderson, 1948; Hickman, 1955), electron micrographs revealed that the phage has a polyhedral head, which, via a neck region, connects with a contractile tail. The phage head has a hexagonal outline, 600 Å across opposite apices.

The ‘neck’ connecting the phage head and tail is 80 Å in length, but the exact point at which it connects to head and tail is not clearly defined. The contractile tail is composed of an outer sheath and a central core, terminating with a base plate. Attached to the base plate are six tail spikes, each 100 Å long. In its extended form the sheath is 800 × 200 Å, with 20 cross bands (Pl. 1, fig. 1, 2).

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1968-07-01
2022-01-19
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References

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