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Journal of Bacteriology, July 2004, p. 4369-4375, Vol. 186, No. 13
0021-9193/04/$08.00+0 DOI: 10.1128/JB.186.13.4369-4375.2004
Copyright © 2004, American Society for Microbiology. All Rights Reserved.
Stowers Institute for Medical Research, Kansas City, Missouri 64110, and Department of Microbiology, Molecular Genetics, and Immunology, University of Kansas Medical Center, Kansas City, Kansas 66160
Received 21 November 2003/ Accepted 1 March 2004
Most of the known prohead maturation proteases in double-stranded-DNA bacteriophages are shown, by computational methods, to fall into two evolutionarily independent clans of serine proteases, herpesvirus assemblin-like and ClpP-like. Phylogenetic analysis suggests that these two types of phage prohead protease genes displaced each other multiple times while preserving their exact location within the late operons of the phage genomes.
Supplemental material for this article may be found at http://jb.asm.org/.
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