.... 16 9 2003 © The Company of Biologists Limited 2003 2003 Haematopoiesis Blood Erythropoiesis Myelopoiesis Vasculogenesis Pronephric duct Heart Lateral mesoderm Somitic mesoderm In mammalian and avian embryos, primitive erythrocytes form in the extraembryonic yolk sac...

..., lung, tongue and head, whereas MFH-1 is expressed in somitic mesoderm, in the endocardium and blood vessels as well as the condensing mesenchyme of the bones and kidney and in head mesenchyme. Both genes are located within a 10 kb region on mouse chromosome 8 at 5.26±2.56 cM telomeric to Actsk1...

... interspecific (chick/quail) and intraspecific (chick/chick) chimaeric studies, involving the heterotopic transplantation of unsegmented somitic mesoderm, indicate that the ability of premyogenic cells to form specific limb muscles is determined by positional cues operative in the host embryo. To determine...