Figure 1

Expression of Osr1 and Osr2: left panel: in-situ hybridisation for Osr1 and Osr2 showing widespread expression of both genes in the chicken limb at Hamburger-Hamilton stage 32. The right panel shows a two-colour ISH for Osr1 or Osr2 together with the myogenic factor MyoD. This shows expression of both Osr genes in chicken muscle connective tissue. Modified from Stricker et al. 2012.