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The molecular weight distribution of poly‐γ‐benzyl‐L‐glutamate prepared by N‐carboxy anhydride (NCA) polymerization with the use of di‐n‐butylamine, diisopropylamine, and sodium methoxide as initiators was investigated. In every case, narrow distributions were found. Moreover the...
To investigate the flexibility or motility of the secondary structure of poly‐L‐glutamic acid, a simple model molecule of proteins, the kinetics of the tritium–hydrogen exchange of this polymer in aqueous solutions was followed at various pH values by use of a freeze‐drying technique and...
Optical rotatory dispersions (ORD) of ovalbumin, conalbumin, ovomucoid, and lysozyme (muramidase) were measured in aqueous solution over a wavelength range of 195–600 mμ. The dispersion curves obeyed a one‐term Drude equation above 300 mμ. The strong Cotton effects in the ultraviolet showed...
The binding of Acridine Orange (AO) to DNA at a phosphorus:dye molar ratio higher than 60 results in an increase of the quantum yield of fluorescence of the bound dye with respect to the free dye. The binding of proflavine (Pro) under the same conditions results, on the contrary, in a large...
Aqueous solutions of ribonuclease and human serum albumin were subjected to periods of controlled heating and the nuclear magnetic spin‐lattice relaxation times, T1, of the water protons measured. The heat treatment causes an initial increase in the relaxation times of the water protons. These...
This paper consists of a theoretical discussion of exciton band contributions to the optical rotatory dispersion of polypeptides in a specific context, namely that of poly‐L‐tyrosine in solution in α‐helix form. The calculated results when compared with existing data suggest that...
The influence of counterion radius on the polyelectrolyte behavior of poly‐L‐cysteate in aqueous solution under different conditions was investigated. A linear relationship was found between a critical concentration in solution of the synthetic charged poly‐peptide and the crystallographic...
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