DNAJB4 and distal myopathy: Similar to DNAJB6, DNAJB4 is an HSP40 co-chaperone of HSP70, and a dominant point mutation (p.F90L) in the G/F domain of DNAJB4 was recently found to cause a late-onset distal myopathy with protein aggregate myopathology (Inoue et al., 2023).