... and Leinwand, 2003 ; Walker et al., 2001 ). Myoid cells of the thymus also express MRFs, but their sarcomeric structures, if present, are disorganized ( Drenckhahn et al., 1979 ; Grounds et al., 1992 ; Kornstein et al., 1995 ). MRF expression has also been reported in the muscle-derived cells of EOs...