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Conformation of poly-S-carboxyethyl-L-cysteine in aqueous solutions

✍ Scribed by Hiroshi Makda; Rhoichi Ikeda

Publisher: Wiley (John Wiley & Sons)
Year: 1971
Tongue: English
Weight: 613 KB
Volume: 10
Category: Article
ISSN: 0006-3525
DOI: 10.1002/bip.360100917

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Molecular conformation of poly-S-carboxy

Molecular conformation of poly-S-carboxytmethyl-L-cysteine in aqueous solutions

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J a p a n ## Synopsis Poly-S-carboxyniethyl-~cysteine has been prepared by debeiizylation of poly-Srarbobenzoxymethyl-bcysteine with hydrogen bromide in acetic acid. By the infrared spectroscopic method the polymer is found to be in the extended p-conformation with a n antiparallel arrangement of

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Potentiometric titration curves have been determined for aqueous solutions of poly-S-carboxyethyl-L-cysteine, which is subject, to the p-coil transition by a change in pH. Iteversibility and time dependence of the titration curves are examined by different methods in order to establish the condilion

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✍ Hiroshi Maeda 📂 Article 📅 1972 🏛 Wiley (John Wiley & Sons) 🌐 English ⚖ 574 KB

Counterion activity of poly-8-carboxyethyl-L-cysteine in salefree solutions neutralized to various degrees with sodium hydroxide was determined either directly from the e.m.f measurements of concentration cells formed across a Na-glass electrode, or from the potentiometric titrations at different so

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✍ Eligio Patrone; Giuseppina Conio; Sergio Brighetti 📂 Article 📅 1970 🏛 Wiley (John Wiley & Sons) 🌐 English ⚖ 788 KB

## Abstract The conformational transition of poly‐L‐tyrosine in 0.1__M__ KCl was investigated by ORD and infrared spectroscopy, potentiometric titration, and sedimentation velocity experiments. It is shown that the fully ordered conformer is obtained by slow titration of the random coil with 0.1__N

Potentiometric titration of poly-S-carbo

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## Abstract pH titration measurements of poly‐ __S__‐carboxymethyl‐L‐cysteine were undertaken in the aqueous Nacl solution in relation to the β form–random coil transition. The titration curves show a marked molecular weight dependence because of the shortened chain length of materials. Comparison

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Induced circular dichroism and mode of binding of acridine orange adsorbed on β-form poly(S-carboxyethyl-L-cysteine) in aqueous solutions

✍ Shoichi Ikeda; Tomohiko Yoshida; Toyoko Imae 📂 Article 📅 1981 🏛 Wiley (John Wiley & Sons) 🌐 English ⚖ 830 KB

## Abstract The absorption spectra and circular dichroism (CD) have been measured for aqueous solutions of acridine orange of a constant concentration, [__D__] = 5 × 10^−5^__M__, mixed with poly(__S__‐carboxyethyl‐L‐cysteine) in various mixing ratios, [__P__]/[__D__], ranging from 330 to 11, at dif