ABSTRACT

Solution densities have been determined for aqueous solutions of the tripeptides of sequence glycyl X glycine, where X is one of the amino acids alanine, valine, leucine, isoleucine, phenylalanine, methionine, and proline, at T = (288.15, 303.15, and 313.15) K. These solution densities were used to calculate the partial molar volumes at infinite dilution, V 2, for the tripeptides. The V 2 results were combined with those determined in previous work for T = 298.15 K to obtain the partial molar isobaric expansions at infinite dilution, E 2fE 2 1/4 o@V 2=@TPpg, for the tripeptides at T = 298.15 K. The contribution of amino acid side-chain hydration to the E 2 results has been discussed.

Compounds

#	Formula	Name
1	C7H13N3O4	glycylalanylglycine
2	C9H17N3O4	glycyl-L-valylglycine
3	C10H19N3O4	glycyl-L-leucylglycine
4	C10H19N3O4	glycyl-L-isoleucylglycine
5	C13H17N3O4	glycyl-L-phenylalanylglycine
6	C9H17N3O4S	glycyl-L-methionylglycine
7	C9H15N3O4	glycyl-L-prolylglycine
8	H2O	water

Datasets

The table above is generated from the ThermoML associated json file (link above). POMD and RXND refer to PureOrMixture and Reaction Datasets. The compound numbers are included in properties, variables, and phases, if specificied; the numbers refer to the table of compounds on the left.
Type	Compound-#	Property	Variable	Constraint	Phase	Method	#Points
POMD	8 1	Mass density, kg/m3 ; Liquid	Temperature, K; Liquid Molality, mol/kg - 1; Liquid	Pressure, kPa; Liquid	Liquid	Vibrating tube method	23
POMD	8 2	Mass density, kg/m3 ; Liquid	Temperature, K; Liquid Molality, mol/kg - 2; Liquid	Pressure, kPa; Liquid	Liquid	Vibrating tube method	25
POMD	3 8	Mass density, kg/m3 ; Liquid	Temperature, K; Liquid Molality, mol/kg - 3; Liquid	Pressure, kPa; Liquid	Liquid	Vibrating tube method	30
POMD	8 4	Mass density, kg/m3 ; Liquid	Temperature, K; Liquid Molality, mol/kg - 4; Liquid	Pressure, kPa; Liquid	Liquid	Vibrating tube method	21
POMD	8 5	Mass density, kg/m3 ; Liquid	Temperature, K; Liquid Molality, mol/kg - 5; Liquid	Pressure, kPa; Liquid	Liquid	Vibrating tube method	25
POMD	8 6	Mass density, kg/m3 ; Liquid	Temperature, K; Liquid Molality, mol/kg - 6; Liquid	Pressure, kPa; Liquid	Liquid	Vibrating tube method	23
POMD	7 8	Mass density, kg/m3 ; Liquid	Temperature, K; Liquid Molality, mol/kg - 7; Liquid	Pressure, kPa; Liquid	Liquid	Vibrating tube method	21

Thermodynamics Research Center / ThermoML | Journal of Chemical Thermodynamics

Volumetric properties of tripeptides with non-polar side-chains: Partial molar volumes at T = (288.15 to 313.15) K and partial molar expansions at T = 298.15 K of some peptides of sequence gly X gly in aqueous solution

Liu, J. L.[Jin L.], Hakin, A. W.[Andrew W.], Hedwig, G. R.[Gavin R.]

ABSTRACT