Supplementary Figure 2: Sample preparation and characterization using EM.
From: Probing a cell-embedded megadalton protein complex by DNP-supported solid-state NMR

a) Lane 1: 10% Tris/Glycine SDS-PAGE of cell envelope of BL21 WT expressing T4SScc. Lanes 2 and 3: 17.5% Tris/Tricine SDS-PAGE of cell envelope of BL21dm expressing T4SScc (lane 2) and without expressing T4SScc (lane 3). M refers to the molecular weight marker. b) Electron Microscopy data of T4SScc after purification