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Ultrasonic studies in relation to the helix–coil transition in aqueous solutions of poly-L-lysine

✍ Scribed by R. Zana; C. Tondre


Publisher
Wiley (John Wiley & Sons)
Year
1971
Tongue
English
Weight
239 KB
Volume
10
Category
Article
ISSN
0006-3525

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Studies of the helix–coil transition of
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Water-insoluble films of poly-L-lysine, crosslinked with formaldehyde, were suspended in aqueous media and their relative lengths measured as a function of pH. A sharp transition of the polymer was observed in the pH range which corresponded with that observed in polylysine solutions by optical rota

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## Abstract Uncharged poly(__N__^ε^‐methyl‐L‐lysine) (PMLL) and its isomer, poly(__N__^δ^‐ethyl‐L‐ornithine) (PELO), in alkaline solution (pH ca. 12) undergo a helix‐to‐β transition upon mild heating at 50°C or higher in a manner similar to that of poly(L‐lysine) (PLL). The rate of conversion follo