Contents 



Molecular Interactions and Structure Formation in Bio- 

 logical Systems 



David F. Waugh 



The Tropocollagen Macromolecule and Its Properties of 



Ordered Interaction ....... 19 



Alan J. Hodge and Francis O. Schmitt 



The Role of the Macromolecular Aggregation State and 



Reactivity of Collagen in Calcification ... 53 



Melvin J. Glimcher 



The Chloroplast 85 



J. J. Wolken 



Lamellar Systems in Myelin and Photoreceptors as 



Revealed by High Resolution Electron Microscopy . 113 



H. Fernandez-Moran 



Fibrillar Systems in the Mitotic Apparatus .... 161 

 Hans A. Went and Daniel Mazia 



The Submicroscopic Basis of Bacterial Photosynthesis: The 

 i Chromatophore 179 



J. A. Bergeron and R. C. Fuller 



