The partial molar isentropic compressibilities at infinite dilution, KS,20
, have been determined for the two peptides
alanylglycylglycylglycine and alanylglycylglycylglycylglycine in aqueous solution at 298.15 K. These results were combined with those obtained previously for the peptides alanylglycine and alanylglycylglycine to derive the partial molar isentropic compressibility of the glycyl group of a polypeptide. The partial molar volumes at infinite dilution, V20, have also been determined for these peptides at temperatures over the range 291.15 to 313.15 K. These results were used to derive the partial molar expansibilities, E20, of the peptides at 298.15 K which were combined with the Ks,20 data to obtain the isothermal compressibilities, KT,20, of the
peptides. Using new V20 data for tetra- and pentaglycine, we have also derived E20 and KT,20
values for some oligoglycines. The KT,20 results for both sets of
peptides were used to derive the isothermal compressibilities of the glycyl group.
You have access to this article
Please wait while we load your content...
Something went wrong. Try again?