For making a general mammalian cell lysis buffer, I have been using HEPES as a component. However, I came across a paper where they have used Tris in place of HEPES while the rest of the parameters are the same. They used 293t cells while I am using lentivirus infected A549 cells with a PLJM1 backbone and a histag-fused protein insert. Upon running a western blot and probing with anti-His primary antibody, the bands look very faint. All components of my buffers are pH balanced as per published protocols.

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