In vitro phosphorylation of FANCA.
(A) In vitro phosphorylation of Flag-wt-FANCA in GM6914 cells. Cell lysates from GM6914 and GM6914/Flag-wt-FANCA were immunoprecipitated (IP) with anti-Flag antibody (M2) or anti-FANCA antibody. For a 2-step immunoprecipitation, Flag-wt-FANCA was absorbed to anti-Flag antibody-conjugated Sepharose, eluted with Flag peptide (100 μg/mL), then immunoprecipitated with anti-FANCA antibody. Immunoprecipitates were incubated in a kinase buffer containing [γ-32P] ATP (10 μCi [0.37 MBq]) for 20 minutes. (B) A time course of in vitro phosphorylation of Flag-wt-FANCA expressed in GM6914 cells. Anti-FANCA immunoprecipitates from GM6914/Flag-wt-FANCA were incubated in a kinase buffer containing [γ-32P] ATP (10 μCi [0.37 MBq]) for the indicated times. Western blots of FANCA were shown at the bottom.