Thermodynamics of Dipeptides in Water. Influence of the hydrophobic forces of the side-chains on the dissociation processes for some series of dipeptides |
| |
Authors: | F Rodante S Vecchio F Fantauzzi |
| |
Institution: | (1) Dipartimento di Ingegneria Chimica dei Materiali delle Materie Prime e Metallurgia, Università ‘La Sapienza’, Via del Castro Laurenziano 7, 00161 Roma, Italy;(2) Dipartimento di Chimica, Ingegneria Chimica e Materiali, Facoltà di Ingegneria, Università degli Studi de l’Aquila, Monteluco di Roio, L’Aquila, Italy |
| |
Abstract: | A calorimetric study has been carried out on the dissociation processes in water of both the free α-amino group belonging
to the amino terminal residue and the free α-carboxyl groups belonging to the carboxyl terminal residue for a series having
phenylalanine as the first common term.
These thermodynamic quantities have been compared with those of the proton dissociation processes related to the same groups
of the corresponding singleα-amino acids. The dissociation process values of this series have also been considered in connection
with those obtained from others series of dipeptides previously studied, in an effort to compare the alkyl groups and benzene
ring hydrophobic effects on the salvation processes of the zwitterions, undissociated molecules and ionic forms.
This revised version was published online in August 2006 with corrections to the Cover Date. |
| |
Keywords: | acidity and basicity scales dipeptides calorimetry hydrophobic effects of side-chains |
本文献已被 SpringerLink 等数据库收录! |
|