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Fig. 5. Nuclear extracts from MDCK-Snail cells contain specific NF
B-binding complexes. Nuclear extracts from MDCK-CMV and MDCK-Snail cells were analysed in band-shift assays showing the binding of nuclear proteins to the 32P-labeled NF
B wild-type probe, in the absence or presence of 500-fold molar excess of wild-type (lanes 3 and 8) or mutant cold oligonucleotides (lanes 4 and 9) or in the presence of anti-p65 (lanes 6 and 11) or control mouse IgG (lanes 5 and 10). Lane 1 shows a control in the absence of the nuclear extract. White arrowheads indicate the complexes detected (i and ii). A black arrowhead indicates the supershifted complex. The complete sequence of the NF
B probe is shown at the bottom of the figure. The specific nucleotides mutated in the NF
B oligonucleotide are underlined. The gel shown is representative of at least two independent experiments.