May play a role during myoblast fusion. Homodimer. Interacts with myosin. Membrane-associated. Distributed in the transverse tubules and near the junctional sarcoplasmic reticulum (By similarity). Detected along the Z- and M-lines in cardiomyocytes (By similarity). Localizes to the centrosomes in a microtubule- dependent manner. Localizes to the centrosomes in a microtubule- dependent manner. Expressed in proliferating myoblasts and differentiated myotubes (at protein level). Expressed in myoblasts, cardiac and skeletal muscles. Expressed in atrial and ventricular chambers of the primitive heart at 9 dpc. Expressed in somites at 11 dpc. Expressed in atrial and ventricular chambers and interventricular and interatrial septum at 13 dpc. Expressed in myotubes between 13 and 15 dpc. Expressed in skeletal muscles at 18 dpc. Belongs to the SLMAP family. Extended N-terminus. Extended N-terminus.