Some problems associated with the exact solution conformation of poly(.ALPHA.-L-glutamic acid) as determined by optical methods.
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By combining the experimental data on circular dichroism and light scattering, the helical conformation of poly(Glu) in 0.15 mol dm<SUP>−3</SUP> NaCl solutions was estimated. The axial translation per residue was probably in the range of 1.2–1.3 Å for the unaggregated helix, while the persistence length was <I>ca.</I> 120 Å for the random-coil.
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