Readers should cite both the Bio-protocol preprint and the original research article where this protocol was used:

Gorby, C and Moraga, I(2021). Protein expression and purification. Bio-protocol Preprint. bio-protocol.org/prep920.
Gorby, C., Bellón, J. S., Wilmes, S., Warda, W., Pohler, E., Fyfe, P. K., Cozzani, A., Ferr, C., Walter, M. R., Mitra, S., Piehler, J. and Moraga, I.(2020). Engineered IL-10 variants elicit potent immunomodulatory effects at low ligand doses . Science Signaling 13(649). DOI: 10.1126/scisignal.abc0653