Proteins associated with SPTAC1L, identified by LC-MS/MS analysis. Proteins immunoprecipitated by an anti-SPATC1L antibody were analyzed by LC-MS/MS. Spec., spectrum count; Seq., sequence count (number of non-redundant peptides identified for each protein); Seq. cov., sequence coverage calculated based on the amino acid count; MW, molecular weight calculated using TurboSEQUEST software. 