For protein content analysis, 30 μg of total protein from each plantaris muscle was separated by SDS-PAGE, transferred onto a PVDF membrane, and immunoblotted as previously described [33 (link)]. The following antibodies (Cell Signaling, Danvers, MA) were used: Ulk1 (1:1000), phospho-Ulk1 (1:1000), Drp1 (1:1000), beclin-1 (1:1000), SQSTM1/p62 (1:1000), Bnip3 (1:1000), LC3B (1:1000), and mitofusin-2 (1:1000). Membranes were analyzed and quantified using Bio-Rad Laboratories Image Lab software (Hercules, CA).
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