Partial molar heat capacities and volumes of aqueous solutions of some peptides that model side-chains of proteins
- 1 January 1993
- journal article
- research article
- Published by Royal Society of Chemistry (RSC) in Journal of the Chemical Society, Faraday Transactions
- Vol. 89 (15) , 2761-2768
- https://doi.org/10.1039/ft9938902761
Abstract
The partial molar volumes, V∞ 2, and partial molar heat capacities, C∞ p, 2, at infinite dilution have been determined for the tripeptides glycyl-L-isoleucylglycine, glycyl-DL-threonylglycine, glycyl-L-asparagylglycine, glycyl-histidylglycine, glycylmethionylglycine and glycylphenylalanylglycine in aqueous solution at 25 °C. These results, in conjunction with those for glycylglycylglycine, were used to estimate the amino acid side-chain contributions to V∞ 2 and C∞ p, 2. The side-chain contributions are compared with those determined using other model compounds. For some side-chains the heat capacities were found to correlate well with the side-chain non-polar surface areas.Keywords
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