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. 2006 Jun 10;62(Pt 7):638–641. doi: 10.1107/S1744309106018240

Figure 1.

Figure 1

SDS–PAGE analysis of the BtuB–TonB147–239 complex. (a) Individual components (and their mixture): lane 1, BtuB; lane 2, molecular-weight standards; lane 3, TonB147–239; lane 4, BtuB–TonB147–239 mixture (slight degradation of BtuB is seen in the faint band below BtuB). (b) Stability of the BtuB–TonB147–239 complex during gel-filtration chromatography: leftmost band, molecular-weight standards; ft, flowthrough from centrifugal concentration; load, the sample injected onto the column. The presence of both BtuB and TonB147–239 is seen in fractions 14–19.