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Expression and purification of the mammalian translocator protein for structural studies

Fig 6

Large-scale purification of cleavable mammalian TSPO.

(A) Overview of the purification steps. (B) Coomassie blue stained SDS-PAGE gel and in gel fluorescence of protein at various stages of purification. The lanes are labelled as follows: “M”—molecular weight marker, “SN”—supernatant, “FT” flow-through, “W1”—wash 1, “W2”—wash 2, “elu”–IMAC elution, “des”—desalting, “3C”–protein after 3C cleavage overnight, “rIMAC”—flow-through of the reverse IMAC procedure, “SEC”—pooled fractions after SEC. The final sample after SEC is monodisperse and does not contain any YFP. (C) Final construct after purification. (D) Size-exclusion profile of cleavable pig TSPO. The fractions of the peak taken for subsequent studies are indicated with the dashed lines.

Fig 6

doi: https://doi.org/10.1371/journal.pone.0198832.g006