Fig. 6
myl1 is the only skeletal fast muscle marker restricted to the skeletal fast muscle domain at 12-somite stage. A: Expression of myl1 (red) is excluded from F59-positive adaxial cells (green) and is specific to the fast domain at 12-somite stage. A2: Blow-up of region boxed in A. A3: Transverse section of 12-somite-stage embryo. B: fmyhc1.3 (red) is co-expressed with F59-positive adaxial cells (green) and is non-specific to the fast domain at 12-somite stage. B2: Blow-up of region boxed in B. B3: Transverse section of 12-somite-stage embryo. C: mylz2 (red) is co-expressed with F59-positive adaxial cells (green) and is non-specific to the fast domain at 12-somite stage. C2: Blow-up of region boxed in C. C3: Transverse section of 12-somite-stage embryo. D: tnni2 (red) is co-expressed with F59-positive adaxial cells (green) and is non-specific to the fast domain at 12-somite stage. D2: Blow-up of region boxed in D. D3: Transverse section of 12-somite-stage embryo.