✦ LIBER ✦
Evidence from circular dichroism for the binding of hydrogen ions and calcium ions by poly(L-proline)
✍ Scribed by Jung-Teh Lo; Wayne L. Mattice
- Publisher
- Wiley (John Wiley & Sons)
- Year
- 1976
- Tongue
- English
- Weight
- 255 KB
- Volume
- 15
- Category
- Article
- ISSN
- 0006-3525
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✦ Synopsis
Abstract
The positive circular dichroism band observed near 228 nm with poly(L‐proline) responds in a similar fashion to HCl and CaCl~2~. The spectra in the HCl solutions are compatible with a simple binding equation and a p__K__ near −2 for the dissociation of a proton from a protonated peptide bond in poly(L‐proline). The data obtained in CaCl~2~ is susceptible to the same analysis, suggesting a p__K__ near −1.5 for the dissociation of a calcium ion from its complex with poly(L‐proline).