MOESM1 of Quantification of serine protease HtrA molecules secreted by the foodborne pathogen Campylobacter jejuni

Additional file 1: Figure S1. Purification of recombinant C. jejuni HtrA expressed in E. coli BL21. Important purification steps are shown, including purification by use of a GST-affinity column, exemplary wash and two elution fractions. The final purification step was performed via gel filtration, showing purified HtrA in fraction 2.