Three related datasets are included, all from immunoprecipitations of FLAG-tagged DCBLD1 and DCBLD2 (human) from 293 cells. Letters at the end of file names denote regions of each gel lave from highest (“A”) to lowest (“B”-X) molecular weight. File names containing “SILAC” are part of a dataset composed of 3 biological replicates (“T1”,”T2”,”T3” in file name) run of 10% or 15% gels (“10” or “15” in file name). DCBLD1 or DCBLD2 were immunoprecipitated from cells alone (light SILAC condition) or with Fyn/Abl (heavy SILAC condition). “Mock”, “Fyn” alone, or “Abl” alone in file names denote control immunoprecipitates, in which the light condition was a mock transfection and the heavy was either a mock or had Fyn/Abl expressed alone. Trypsin was used as the proteolytic enzyme. File names beginning with “Label_free” are part of datasets from LC-MS/MS analysis of DCBLD1 or DCBLD2 immunoprecipitates from 293 lysates. Prior to LC-MS/MS analysis, immunoprecipitates were digested with trypsin and GluC. Only DCBLD1 and DCBLD2 protein bands were analyzed via LC-MS/MS. File names containing “zebrafish” are part of datasets from LC-MS/MS analysis of DCBLD2 immunoprecipitates from 293 extracts that were then incubated with zebrafish extracts. These datasets include tryptic peptides from both human and zebrafish proteins.