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Fig. 4. Cbl interacts with {alpha}5 integrin subunit and ubiquitin and is involved in {alpha}5 integrin proteasome degradation induced by FGFR2 activation. (A) FGFR2 mutant cells were treated with lactacystin for 24 hours, cell lysates were immunoprecipitated (IP) with {alpha}5 integrin antibody, resolved with SDS-PAGE and blotted with anti-{alpha}5 integrin. (B) Cell lysates from control and FGFR2 mutant osteoblasts were immunoprecipitated (IP) with Cbl antibody, resolved by SDS-PAGE and blotted with anti-{alpha}5 integrin antibody. (C) Cell lysates from control and FGFR2 mutant osteoblasts were immunoprecipitated (IP) with anti-{alpha}5 integrin, resolved by SDS-PAGE and blotted with anti-ubiquitin antibody.