Fig. 7.
Association of mi with USF2 in activated MC-9 cells. [35S]-methionine–labeled activated cells (IL-3, IgE-DNP, or IL-4) were lysed with RIPA and incubated with protein A-bound anti-mi antibody. Immunocomplexes were then dissociated from the beads and either reprecipitated or not on protein A bound USF2 (A). Alternatively, [35S]-methionine–labeled IL-3–activated MC-9 cells were lysed with RIPA and incubated with protein A-bound anti-USF2 antibody. The immunocomplexes were then dissociated from the beads, diluted, and reprecipitated on either protein A-bound mi (B) or myosin (C) antibodies. Analysis was by SDS-PAGE. One representative experiment of three performed is shown.