Myocardial progenitors in the pharyngeal regions migrate to distinct conotruncal regions

Localized surface antigens of guinea pig sperm migrate to new regions prior to fertilization

We have previously defined distinct localizations of antigens on the surface of the guinea pig sperm using monoclonal antibodies. In the present study we have demonstrated that these antigen localizations are dynamic and can be altered during changes in the functional state of the sperm. Before the sperm is capable of fertilizing the egg, it must undergo capacitation and an exocytic event, the ...

Approaches to sustainable development of arid regions

Interest in arid ecosystems as a source of food supply for rapidly increasing population of the world, on the one hand, and the problems pertaining to the climatic characteristics, water shortages and soil sensitivity for the inhabitants in such areas, on the other have prompted efforts at both national and international levels to develop a better understanding of these problems as well as to f...

Distinct functional surface regions on ubiquitin.

The characterized functions of the highly conserved polypeptide ubiquitin are to target proteins for proteasome degradation or endocytosis. The formation of a polyubiquitin chain of at least four units is required for efficient proteasome binding. By contrast, monoubiquitin serves as a signal for the endocytosis of plasma membrane proteins. We have defined surface residues that are important fo...

Income Convergence In Iranian Regions

Transplanted Neocortical Neurons Migrate to Repopulate Selectively Neuron-Deficient Regions After Photolytic Pyramidal Neuron Degeneration

The purpose of these experiments was to study neuronal migration and cellular integration following transplantation of immature neocortical neurons or pluripotent transformed neuronal precursor cell lines into a "customgenerated" pyramidal neuron deficient host. The experiments investigated both specificity of laminar positioning during cerebral development, and control mechanisms that may be m...