Recombinant proteins used in this work. A. Schematic representation of TAT-BID constructs used in this study. B. Purity of recombinant TAT-BID, its mutants, and TRAIL. The gel was stained with Coomassie Brilliant Blue R-250. C. Chromatography of TRAIL on Superdex 200 (original picture is shown; straight lines at the bottom illustrate controls). Position of the trimeric form of TRAIL is marked.