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As a continuation of previous papers (Biopolymers (1976) 15, 879; (1978) 17, 1508), the low‐frequency dielectric relaxation of DNA solutions was studied with a four‐electrode cell and the simultaneous two‐frequency measurement. Below a critical concentration, the dielectric relaxation time...
We consider the problem of making allowance for superhelicity in the statistical‐mechanical calculations of fluctuational violations of the DNA double helix. A simple model is discussed, making it possible in the calculations to use an approach based on the theory of helix–coil transition in...
High‐molecular‐weight chicken erythrocyte chromatin was prepared by mild digestion of nuclei with micrococcal nuclease. Samples of chromatin containing both core (H3, H4, H2A, H2B) and lysine‐rich (H1, H5) histone proteins (whole chromatin) or only core histone proteins (core chromatin)...
Intercalation‐site geometries are generated for a tetramer duplex extracted from B‐DNA. Glycosidic angles and puckers of the deoxyribose sugar groups bonded to base pairs BP1 and BP4, namely, those at either end of the tetramer duplex, are assumed to be those of B‐DNA to insure continuity....
Calorimetric measurements of ΔH, the enthalpy of mixing with NaCl solutions per mole of polymer charge equivalent, have been made for the sodium salts of hyaluronate, chondroitin 4‐sulfate, and chondroitin over the range msf = 0–0.5 (where msf is final NaCl molality); corrections were made...
The rates of the translational motion of myosin fragments, heavy meromyosin (HMM), and heavy meromyosin subfragment‐1 (HMM S‐1) were measured during actin‐activated ATPase reaction by the method of fluorescence correlation spectroscopy. This technique monitors the random fluctuations in the...
The addition of methylene blue to certain samples of Na alginate produces a complex succession of spectrally distinguishable aggregated (metachromatic) dye species. Three of these species are active in CD; they are interpreted as aggregates of dye, but probably dimers, bound in orientations...
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