Toc: Content: Edited by Page iii Copyright page Page iv Contributors to Volume XII Page v Preface Pages vii-viii Christian B. Anfinsen, M.L. Anson, Kenneth Bailey, John T. Edsall The Fibrinogen-Fibrin Conversion Original Research Article Pages 1-131 Harold A. Scheraga, Michael Laskowski Jr. X-Ray Analysis and Protein Structure Original Research Article Pages 133-214 F.H.C. Crick, J.C. Kendrew The Human Hemoglobins: Their Properties and Genetic Control Original Research Article Pages 215-268 Harvey A. Itano Hormones of the Anterior Pituitary Gland. Part II. Melanocyte-Stimulating and Lactogenic Hormones Original Research Article Pages 269-317 Choh Hao Li The Activation of Zymogens Original Research Article Pages 319-386 Hans Neurath The Chemical Nature of Antibodies Original Research Article Pages 387-463 Henry C. Isliker The Synthesis of Peptides Original Research Article Pages 465-638 Murray Goodman, G.W. Kenner Author Index Pages 639-671 Subject Index Pages 673-687