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  • FAQ: Why is the induced protein insoluble (C2530)?

    High level expression of non-native genes often results in the target protein becoming insoluble. Potential solutions are:
    • Induce at a lower temperature (as low as 15°C overnight)
    • Reduce IPTG concentration to 40 μM
    • Induce earlier in growth phase (OD600 = 0.3–0.4) and harvest cells earlier.
    • Create an expression construct where the target protein is fused to maltose binding protein (pMAL Protein Fusion and Purification System, NEB #E8200).