Fig. 1.

Domainal organization of the bacteriophage T4 long tail fiber. a Outline of the bacteriophage T4 long tail fiber (LTF), composed of gene products (gp)34–gp37. The proximal tail fiber is on the left and the distal tail fiber is on the right, as in the marked tail fiber in the whole phage drawing. Lines indicate approximate borders between the four proteins. b Domainal and protein functional correspondence for the LTF. Protein locations are indicated above the outline and the functional domains are indicated under the outline. Mass domain names are shown for the proximal half-fiber (P1–P5), the knee-cap (KC), and the distal half-fiber (D1–D11), and refer to the mass domains identified by Cerritelli et al. (1996). The correspondence between the functional and mass domains as well as the position of the mass domains is approximate. c Detailed positions of functional domains, with the numbers after each function description indicating the amino acid (aa) residues in that protein for that domain when known. Amino (N) and carboxy (C) ends of gp34, gp36, and gp37 are indicated. There is no corresponding information for gp35. The two deletions mentioned in the text in the central rod region of gp37 are also shown