Anti-myosin, heavy chain 3, skeletal muscle, embryonic antibodies enable researchers to detect and measure the myosin, heavy chain 3, skeletal muscle, embryonic antigen in biological samples. This target is a reported synonym of the MYH3 gene, which encodes myosin heavy chain 3. This protein is known to function in muscle organ development, among other biological roles. The human version of myosin, heavy chain 3, skeletal muscle, embryonic has a canonical amino acid length of 1940 residues and a protein mass of 223.9 kilodaltons. It is reported to be localized in the cytoplasm of cells and notably expressed in the heart muscle and skeletal muscle. Other names for this target antigen include CPSFS1A, CPSFS1B, and CPSKF1A.