Abstract
The milk proteins β- and κ-casein are in a monomeric state below their critical micelle concentration (cmc) and spontaneously self-associate above the cmc, at or above room temperature. Small-angle neutron scattering (SANS) measurements at 5 g L-1 confirmed the high specific volume of these micelles, and 1H-NMR and calorimetric measurements showed that the polypeptide chains remain open and their side chains largely flexible in the associated state. The experimental values of parameters used to describe both types of micelle were radius of gyration of 8 nm, scattering radius (in 2H2O) of 11 nm, and interaction radius close to 15 nm. The scattering radius is obtained by assuming a homogeneous sphere, and the interaction radius by assuming hard-sphere-like behavior. The micelle size, structure, and interaction radius were independent of concentration. The interparticle structure factor of the micelles was determined using a polydisperse hard-sphere model, which showed that the wave vector position of the pe...
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.