CONTENTS 



Page 



Preface v 



Participants vi 



GROSS, PAUL R. RNA and Protein Synthesis in Developing Sea 



Urchin Eggs . o 1 



EPEL, DAVID Early Biochemical Events Following Fertilization 



of Sea Urchin Eggs 17 



KOHNE, DAVID E. Ribosomal Ribonucleic Acid Synthesis in 



Rana pipiens Embryos. 35 



PAPACONSTANTINOU, JOHN Molecular Aspects of Lens Cell 



Differentiation 47 



TILL, JAMES E. Proliferation and Differentiation of Stem Cells 



of the Blood-forming System of the Mouse 69 



MASSARO, EDWARD J. The Structure of Isozyme Systems and 



Their Role in Development 77 



GREGG, JAMES H. Antigen Synthesis During Reorganization in 



the Cullular Slime Molds 93 



WRIGHT, BARBARA Control of Enzyme Activities in D. 



discoideum During Development 109 



KAHN, ARNOLD J. Cell Interactions in Slime Mold (Acrasina) 



Development 123 



CHALKLEY, ROGER Histones in Relation to Control in Living 



Systems 131 



CANTING, EDWARD C. Dynamics of the Point of No Return 



During Differentiation in Blastocladiella emersonii 149 



LOVETT, JAMES S. Nucleic Acid Synthesis During Differentia- 

 tion of Blastocladiella emersonii 165 



TS'O, PAUL O. P. The Molecular Aspect of Nucleic Acid Inter- 

 actions 183 



TS'O, PAUL O. P. The Problems and Promises of Research on 



the Molecular Aspects of Development (Workshop Summary) 195 



ui 



