Fig. 4.
Fig. 4. Immune complex kinase activity of TM4SF-associated and total c-kit fractions in the absence or the presence of SLF. / MO7e cells were stimulated with or without 50 ng/mL SLF at 37°C for 10 minutes. Cells were solubilized with lysis buffer containing 1% CHAPS. The cell lysates were immunoprecipitated with indicated first antibodies. Immunoprecipitated materials were eluted with 1% NP-40 lysis buffer and supernatants were immunoprecipitated with anti–c-kit mAb (cloneYB5.B8). In the case of anti–c-kit mAb as a first immunoprecipitation antibody, immunoprecipitated proteins were treated with NP-40 in the same way. The immune complexes were incubated with 10 μCi (0.37 MBq) [32P-γ] adenosine triphosphate for 10 minutes at room temperature. Immune complexes were separated by SDS-PAGE and transferred onto Immobilon-P membrane. [32P] incorporation into c-kit protein was visualized by autoradiography (upper panel). The same membrane was immunoblotted with anti–c-kit polyclonal antibody (lower panel). These are the representative results from 2 separate experiments.

Immune complex kinase activity of TM4SF-associated and total c-kit fractions in the absence or the presence of SLF.

MO7e cells were stimulated with or without 50 ng/mL SLF at 37°C for 10 minutes. Cells were solubilized with lysis buffer containing 1% CHAPS. The cell lysates were immunoprecipitated with indicated first antibodies. Immunoprecipitated materials were eluted with 1% NP-40 lysis buffer and supernatants were immunoprecipitated with anti–c-kit mAb (cloneYB5.B8). In the case of anti–c-kit mAb as a first immunoprecipitation antibody, immunoprecipitated proteins were treated with NP-40 in the same way. The immune complexes were incubated with 10 μCi (0.37 MBq) [32P-γ] adenosine triphosphate for 10 minutes at room temperature. Immune complexes were separated by SDS-PAGE and transferred onto Immobilon-P membrane. [32P] incorporation into c-kit protein was visualized by autoradiography (upper panel). The same membrane was immunoblotted with anti–c-kit polyclonal antibody (lower panel). These are the representative results from 2 separate experiments.

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