His6-tagged FtsA and FtsA*-like variants were purified using Talon metal affinity resin as described (Krupka et al., 2017 (link)). The purified proteins (
Cell extracts were processed for immunoblotting as described (Haeusser et al., 2014 (link)), using anti-FLAG (1:2000), affinity purified polyclonal anti-FtsZ (1:5000), and primary and goat anti-rabbit secondary antibodies (1:2000, Sigma) conjugated to horseradish peroxidase. Western Lightning ECL Pro kit (PerkinElmer) was used to detect chemiluminescence. Protein band intensities were measured and compared using ImageJ (Schneider et al., 2012 (link)).