A. The β′-4PrA fusion protein, and co-isolating proteins, was affinity purified from E. coli 55 infected with phiEco32 (lane 1; control), E. coli 55rpoC::4PrA (lane 2), and E. coli 55rpoC::4PrA + phiEco32 (lane 3). The samples were analyzed by SDS-PAGE and bands due to proteins present in lane 3, but absent from lanes 1 and 2, were identified by MALDI MS.
B. NSAF values for proteins identified by MudPIT in RNAP samples affinity purified from both phiEco32-infected and uninfected cells are shown.