Figure - PMC

Skip to main content

An official website of the United States government

Here's how you know

Here's how you know

Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Secure .gov websites use HTTPS
A lock ( ) or https:// means you've safely connected to the .gov website. Share sensitive information only on official, secure websites.

View full-text article in PMC

. 2020 Jul 5;12(7):725. doi: 10.3390/v12070725

Search in PMC
Search in PubMed
View in NLM Catalog
Add to search

© 2020 by the authors.

Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).

PMC Copyright notice

Transmission electron microscopy of Salmonella phage SPN3US protease mutants 245(am59) (A–D) and 245(am66) (E,F). Many precursor head particles and tails were observed. Numbers of precursor head particles were observed to have internal material (black arrow) that contained a central darkly staining region (white arrows). This darkly staining region was interpreted to not be DNA as there was no detectable DNA in these samples (see Figure S2). (A,B,E,F) Particles treated with DTSSP prior to purification (no extensive crosslinking of major head proteins was observed by SDS-PAGE). (C,D) Particles were treated with glutaraldehyde prior to purification. (C) A contractile tail apparently cross-linked to a flagellum via its baseplate/fibers.