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stregth and conditioning

R Sperling, M Bustin
The assembly of acid-extracted, purified F2a1, F3, F2a2, and F2b histones and their six possible pairwise combination into organized structures has been studied by: (1) sedimentation velocity, (2) sedimentation equilibrium, (3) electrophoresis in polyacrylamide gels containing sodium dodecyl sulfate after cross-linking the protein solution with dimethyl suberimidate, and (4) electron microscopy. Each of the purified histone fractions can renature and assemble into high molecular weight organized structures...
July 29, 1975: Biochemistry
K J Karnaky, S A Ernst, C W Philpott
Certain euryhaline teleosts can tolerate media of very high salinity, i.e. greater than that of seawater itself. The osmotic gradient across the integument of these fish is very high and the key to their survival appears to be the enhanced ability of the gill to excrete excess NaCl. These fish provide an opportunity to study morphological and biochemical aspects of transepithelial salt secretion under conditions of vastly different transport rates. Since the cellular site of gill salt excretion is believed to be the "chloride cell" of the branchial epithelium and since the enzyme Na,K-ATPase has been implicated in salt transport in this and other secretory tissues, we have focused our attention on the differences in chloride cell structure and gill ATPase activity in the variegated pupfish Cyprinodon variegatus adapted to half-strength seawater (50% SW), seawater (100% SW), or double-stregth seawater (200% SW)...
July 1976: Journal of Cell Biology
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