The ultrastructure of developing sarcoplasmic reticulum.
TLDR
The reasonably close correlation between Ca2+ transport activity and the intramembranous particle density during development supports earlier suggestions that the intamem branous particles may represent the Ca2- transport system.About:
This article is published in Journal of Biological Chemistry.The article was published on 1974-01-25 and is currently open access. It has received 88 citations till now. The article focuses on the topics: Endoplasmic reticulum & Skeletal muscle.read more
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Book ChapterDOI
Membrane and Cytoplasmic Changes in B Lymphocytes Induced by Ligand-Surface Immunoglobulin Interaction
TL;DR: This chapter discusses membrane and cytoplasmic changes in B lymphocytes induced by ligand–surface immunoglobulin (Ig) interaction by using ultrastructural analysis of regular thin section of cells exposed to antibodies conjugated to a large visible molecule.
Journal ArticleDOI
Isolation and characterization of the components of the sodium pump
TL;DR: A satisfactory understanding of the functions of the sodium pump, the system responsible for the active transport of sodium and potassium, require the isolation and characterization of its protein and lipid components which are integrated in the structure of the cell membrane.
Journal ArticleDOI
Relaxation of vertebrate skeletal muscle. A synthesis of the biochemical and physiological approaches.
TL;DR: Some aspects of the re la t ion between ca lc ium and a c t i n m y o s i n in terac t ion are described.
Journal ArticleDOI
Effect of the purified (Mg2+ + Ca2+)-activated ATPase of sarcoplasmic reticulum upon the passive Ca2+ permeability and ultrastructure of phospholipid vesicles.
TL;DR: The contribution of membrane proteins to the Ca2+ permeability was studied by incorporating the purified [Ca2+ + Mg2+]-activated ATPase into bilayer membranes prepared from different phospholipids.
Journal ArticleDOI
Isolation and characterization of canine cardiac sarcoplasmic reticulum with improved Ca2+ transport properties.
TL;DR: The analyses indicate that the orientation and turnover number of the cardiac Ca2+ pump protein are similar to those of the skeletal muscle enzyme, and that the major factor in the lowerCa2+ transport rate of cardiac sarcoplasmic reticulum is a lower density of Ca2+, pump polypeptides in the membrane.
References
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Journal ArticleDOI
Sarcoplasmic Reticulum III. THE ROLE OF PHOSPHOLIPIDS IN THE ADENOSINE TRIPHOSPHATASE ACTIVITY AND Ca++ TRANSPORT
TL;DR: Treatment of skeletal muscle microsomes with phospholipase C inhibits the adenosine triphosphatase activity and calcium transport, parallel with the selective hydrolysis of membrane lecithin, and is accompanied by tight binding ofospholipids to the microsomal membrane.
Journal ArticleDOI
The structure of erythrocyte membranes studied by freeze-etching. II. Localization of receptors for phytohemagglutinin and influenza virus to the intramembranous particles.
TL;DR: Results provide further support for the idea that membrane-bound glycoproteins are oriented so that their carbohydrate-rich segments, which bear the antigenic sites and receptors, are exposed to the external medium, while hydrophobic segments of the same molecules interact with lipids, and possibly other proteins, to form the intramembranous particles.
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Membrane formation by the adenosine triphosphatase of sarcoplasmic reticulum.
TL;DR: It is concluded that the purified ATPase enzyme is a functional subunit and is likely to be a structural subunit of the sarcoplasmic reticulum membrane.
Journal ArticleDOI
Lamellar and hexagonal lipid phases visualized by freeze-etching
TL;DR: On uncontaminated specimens, no structures were found which resembled the particulate material of natural membranes and neither degree of saturation, degree of hydration, nor cholesterol admixture significantly affects the appearance of lamellar fracture faces which appear uniformly smooth.