MKLN1 and bipolar disorder: Recent studies have reported that MKLN1 is involved in many diseases,31, 32, 33 and a meta‐analysis genome‐wide association study suggested that MKLN1 is related to early‐onset bipolar disorder,33 and Tagnaouti et al.33reported that muskelin are expressed throughout the central nervous system (CNS) with significantly high levels in the hippocampus and cerebellum regions, suggesting that MKLN1 is a multifunctional protein associated with cell membranes and/or large protein complexes in most neurons.