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A study of the super helical structure of synthetic polypeptides, such as poly‐γ‐benzyl‐D (or L)‐glutamate (PBDG or PBLG) was carried out. The PEG was dissolved in dimethylformamide (DMF). The solution was either allowed to remain at room temperature for a long time or poured into some...
Optical rotatory dispersion measurements on metachromatic heparin:dye complexes have revealed Cotton effects in the absorption region of the hound dye which are dependent upon the “native” integrity of the heparin molecule and upon the dye to site ratio, that is, the dye array. According to...
Changes in the viscosity of amylose that had been oxidized In an aqueous medium at pH 3.0 by sodium metaperiodate were followed as a function of time. Levels of 20, 40, 60, 80, and 100% periodate oxidation were attained. The rate of hydroxyl ion cleavage of the periodate oxidized amylose...
Using a chromatographic technique, the adsorption of the polyribonucleotides s‐RNA and poly‐A provided with tri‐n‐butylammonium ions from an aqueous solution on to the surface of polymeric hydrocarbon granules has been demonstrated. The aqueous solution from which adsorption takes place...
It was established that phenol‐2,4‐disulfonyl chloride and α‐naphthol‐2, 4‐disulfonyl chloride introduce new intramolecular or tertiary bonds into lysozyme. The phenolic hydroxyl group seems to make the cross linking reagents soluble in aqueous media; it was established that a...
Deoxyribonucleic acids (DNA's) extracted from several biological sources have been studied by means of the flow dichroism method, using the transparent coaxial cylinder apparatus. This study has two purposes: (1) to make clear the hydrodynamic behavior of the DNA chain, and the regularity in the...
It is shown that the formation of the three‐strand poly (A + 2U) complex is accompanied by a decrease in optical absorbance at 280 mμ, while the format ion of poly (A + U) is not. This difference makes it possible to demonstrate that in dilute solutions (∼10−4 monomolar), a 1 : 1 mixture...
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