Electron microscopy of polyribosomes synthesizing immunoglobin chains. Comparison with sizes determined by density-gradient-sedimentation data

Electron Microscopy of Polyribosomes Synthesizing Immunoglobulin Chains

Polyribosomes from the immunoglobulin-producing plasma-cell tumour X5563 were fractionated on a linear sucrose gradient and fractions containing polyribosomes carrying heavy (H) and light (L) immunoglobulin chains were examined with the electron microscope. The size distribution of the polyribosomes in the various fractions was determined. The results are consistent with previous estimates by W...

Comparison of Aerobic Sporadic Bacilli Structure with Electron Microscopy

I. The existence of differences and similarities in the sur- 4. face features not only of different organisms or groups but also within given species has been demonstrated by a variety of techniques. 2. The different reactions of various organisms to the Gram stain might well be taken as one piece of evidence, the use of the electron microscop and associated prepa­rative techniques (includi...

Detection of rotavirus by Latex Agglutination Test (Rotales); Comparison with Electron Microscopy and Complement Fixation Test

Examination of Lung Parenchyma by Electron Microscopy

In this paper many of the principal struc­ture of the Moral Lung were studied with the help of Electron Microscopy. Detailed descrip­tion was given of Granular Pneumocytes, Membranous Pneumocytes, Macrophages, and Alveolar Capillaries. A discussion followed on the form and function of Granular Pneumo­cytes.  Acknowledgements  I am grateful to the Reza Shah Pahlavi Foundation for its generou...

[ 6 ] Density Gradient Sedimentation Equilibrium

In 1957, Meselson, Stahl, and Vinograd 1 introduced the remarkable technique of sedimentation equilibriuln in a density gradient for the study of the properties of high molecular weight DNA in solution. Because of the very high molecular weights of DNA, conventional sedimentation equilibrium cannot be used; for even at the lowest centrifugal fields which are practical, the force on these molecu...