INS and obesity due to melanocortin 4 receptor deficiency: Elevated Drp1(Ser616) phosphorylation and/or Drp1 protein content in skeletal muscle have been reported under obesity and insulin‐resistant conditions (Gundersen et al., 2020; Jheng et al., 2012; Leduc‐Gaudet et al., 2018; Liu et al., 2014).