Fig. 5.

Protein composition of phage Premi virions. A) Phage Premi particles purified by CsCl gradient were separated on a 15% Tris-Tricine SDS-PAGE gel. The arrowhead indicates the position of major capsid protein. An asterisk (*) indicates an apparent molecular weight (MW) that matches that of a protein identified by mass spectrometry. The complete Tris-Tricine SDS-PAGE gel image is shown in Supplementary Figure 1. B) Table of mass spectrometry results for trypsin-digested Premi proteins from whole phage particles. #PSMs is the total number of peptide spectral matches identified for a protein and the unique peptide count is equal to the number of peptide sequences exclusive to the protein.