ABSTRACT

Solution densities have been determined for aqueous solutions of the tripeptides of sequence glycyl-Xglycine, where X is one of the amino acids serine, threonine, asparagine, glutamine, cysteine, histidine, and tyrosine, 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 2 {E 2 ) ( YV 2 / YT)p}, 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	H2O	water
2	C7H13N3O5	glycyl-L-serylglycine
3	C8H15N3O5	glycyl-L-threonylglycine
4	C8H13N3O6	L-aspartoylbisglycine
5	C9H15N3O6	L-glutamoylbisglycine
6	C7H13N3O4S	glycyl-L-cysteinylglycine
7	C10H15N5O4	glycyl-L-histidylglycine
8	C13H17N3O5	glycyl-L-tyrosylglycine

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	2 1	Mass density, kg/m3 ; Liquid	Molality, mol/kg - 2; Liquid Temperature, K; Liquid	Pressure, kPa; Liquid	Liquid	VIBTUB:UFactor:6	33
POMD	1 3	Mass density, kg/m3 ; Liquid	Molality, mol/kg - 3; Liquid Temperature, K; Liquid	Pressure, kPa; Liquid	Liquid	VIBTUB:UFactor:6	28
POMD	1 4	Mass density, kg/m3 ; Liquid	Molality, mol/kg - 4; Liquid Temperature, K; Liquid	Pressure, kPa; Liquid	Liquid	VIBTUB:UFactor:6	36
POMD	1 5	Mass density, kg/m3 ; Liquid	Molality, mol/kg - 5; Liquid Temperature, K; Liquid	Pressure, kPa; Liquid	Liquid	VIBTUB:UFactor:6	20
POMD	1 6	Mass density, kg/m3 ; Liquid	Molality, mol/kg - 6; Liquid Temperature, K; Liquid	Pressure, kPa; Liquid	Liquid	VIBTUB:UFactor:6	27
POMD	1 7	Mass density, kg/m3 ; Liquid	Molality, mol/kg - 7; Liquid Temperature, K; Liquid	Pressure, kPa; Liquid	Liquid	VIBTUB:UFactor:6	30
POMD	8 1	Mass density, kg/m3 ; Liquid	Molality, mol/kg - 8; Liquid Temperature, K; Liquid	Pressure, kPa; Liquid	Liquid	VIBTUB:UFactor:6	33

Thermodynamics Research Center / ThermoML | Journal of Chemical and Engineering Data

Volumetric Properties of Tripeptides with Polar Side-Chains: Partial Molar Volumes at (288.15 to 313.15) K and Partial Molar Expansions at 298.15 K of Some Peptides of Sequence Gly-X-Gly in Aqueous Solution

Parr, D. C.[Daniel C.], Hedwig, G. R.[Gavin R.], Hakin, A. W.[Andrew W.]

ABSTRACT