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Martinez, M.J.; Sánchez, C.C.; Patino, J.M.R.; Pilosof, A.M.R. "Bulk and interfacial behaviour of caseinoglycomacropeptide (GMP)" (2009) Colloids and Surfaces B: Biointerfaces. 71(2):230-237
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Abstract:

Caseinoglycomacropeptide (GMP) is a hydrophilic glycopeptide released from milk κ-casein by chymosin hydrolysis during cheese making. GMP is thought to be a potential ingredient for specific dietary applications with several health benefits. In this study GMP was characterized at the air-water interface and its behaviour was related with the self-assembly of GMP in solution as affected by pH. This GMP self-assembly was investigated by dynamic light scattering and the interfacial properties were determined by tensiometry and surface dilatational measurements at pH 4, 5 and 7. At pH 5 GMP exhibited higher surface pressure at equilibrium than at pH 7. At pH 4 the behaviour was more complex due to self-assembly close to GMP pI. Dynamic measurement showed that the adsorption/penetration rate constant (Kads) is facilitated at higher GMP bulk concentrations, while the rate constant of rearrangement (Kr) decreased at higher GMP concentrations which could be attributed to the existence of a steric restriction due to the higher GMP load at the interface. Kr was higher at pH 5 because of lower electrostatic interactions close to the pI. The viscoelastic properties showed a complex behaviour due to the existence of protein-protein interactions depending on the GMP concentration, on the pH of the bulk and on the rates of diffusion, adsorption and rearrangement of GMP at the air-water interface. © 2009 Elsevier B.V. All rights reserved.

Registro:

Documento: Artículo
Título:Bulk and interfacial behaviour of caseinoglycomacropeptide (GMP)
Autor:Martinez, M.J.; Sánchez, C.C.; Patino, J.M.R.; Pilosof, A.M.R.
Filiación:Departamento de Industrias, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Ciudad Universitaria, 1428 Buenos Aires, Argentina
Departamento de Ingeniería Química, Facultad de Química, Universidad de Sevilla, C/Prof. Garcia Gonzalez 1, 41012 Seville, Spain
Palabras clave:Caseinoglycomacropeptide; Dynamic light scattering; Interface; pH; Air-water interfaces; Bulk concentrations; Caseinoglycomacropeptide; Cheese makings; Chymosin; Dynamic measurements; Electrostatic interactions; Glycopeptide; Health benefits; Interface; Interfacial properties; Protein-protein interactions; Self- assemblies; Surface pressures; Tensiometry; Visco-elastic properties; Adsorption; Air; Dynamic light scattering; Rate constants; Refraction; Scattering; Self assembly; Phase interfaces; caseinoglycomacropeptide; chymosin; glycopeptide; kappa casein; peptide derivative; protein; unclassified drug; water; adsorption; air; article; bulk density; cheesemaking; concentration (parameters); diffusion; dynamic exercise; dynamics; electricity; equilibrium constant; hydrolysis; hydrophilicity; light scattering; measurement; milk; nutritional assessment; pH; pressure; priority journal; protein interaction; stereospecificity; viscoelasticity; Adsorption; Air; Caseins; Diffusion; Elasticity; Glycopeptides; Hydrogen-Ion Concentration; Kinetics; Milk Proteins; Particle Size; Pressure; Solutions; Surface Properties; Temperature; Time Factors; Viscoelastic Substances; Viscosity; Water
Año:2009
Volumen:71
Número:2
Página de inicio:230
Página de fin:237
DOI: http://dx.doi.org/10.1016/j.colsurfb.2009.02.006
Título revista:Colloids and Surfaces B: Biointerfaces
Título revista abreviado:Colloids Surf. B Biointerfaces
ISSN:09277765
CODEN:CSBBE
CAS:chymosin, 9001-98-3; protein, 67254-75-5; water, 7732-18-5; Caseins; Glycopeptides; Milk Proteins; Solutions; Viscoelastic Substances; Water, 7732-18-5; kappa-casein glycomacropeptide
Registro:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_09277765_v71_n2_p230_Martinez

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Citas:

---------- APA ----------
Martinez, M.J., Sánchez, C.C., Patino, J.M.R. & Pilosof, A.M.R. (2009) . Bulk and interfacial behaviour of caseinoglycomacropeptide (GMP). Colloids and Surfaces B: Biointerfaces, 71(2), 230-237.
http://dx.doi.org/10.1016/j.colsurfb.2009.02.006
---------- CHICAGO ----------
Martinez, M.J., Sánchez, C.C., Patino, J.M.R., Pilosof, A.M.R. "Bulk and interfacial behaviour of caseinoglycomacropeptide (GMP)" . Colloids and Surfaces B: Biointerfaces 71, no. 2 (2009) : 230-237.
http://dx.doi.org/10.1016/j.colsurfb.2009.02.006
---------- MLA ----------
Martinez, M.J., Sánchez, C.C., Patino, J.M.R., Pilosof, A.M.R. "Bulk and interfacial behaviour of caseinoglycomacropeptide (GMP)" . Colloids and Surfaces B: Biointerfaces, vol. 71, no. 2, 2009, pp. 230-237.
http://dx.doi.org/10.1016/j.colsurfb.2009.02.006
---------- VANCOUVER ----------
Martinez, M.J., Sánchez, C.C., Patino, J.M.R., Pilosof, A.M.R. Bulk and interfacial behaviour of caseinoglycomacropeptide (GMP). Colloids Surf. B Biointerfaces. 2009;71(2):230-237.
http://dx.doi.org/10.1016/j.colsurfb.2009.02.006