What QC data do you provide for E. coli expression? May 27, 2021 07:27 Updated SDS-PAGE is default free QC test. Related articles How can I choose an expression system for my protein? What's the timeline for insect expression and purification? Where is the HIS tag going to be added for bacterial system? Did you have any difficulty in your expression and purification experiences? How much protein can your team usually obtain from 1L pilot project in different expression systems?