Subunit structure of casein micelles from small-angle neutron-scattering.
Wet pellets of whole casein micelles of cows' milk have been studied by small-angle neutron-scattering. Contrast variation using 2H2O/H2O mixtures showed that the previously observed inflection in scattered intensity at Q[4 pi sin theta)/gamma) = 0.035 A-1 is due primarily to scattering from protein, and not from calcium phosphate. Agreement between measured scattering and that calculated for a simple model of packed protein subunits suggests that the whole micelle contains protein subunits of the approximate size of free casein submicelles, packed in a short-range ordered arrangement.
Stothart
P H
PH
AFRC Institute of Food Research, Reading Laboratory, U.K.
D000818:Animals; D002130:Calcium Phosphates; D002364:Caseins; D003102:Colloids; D008823:Micelles; D008892:Milk; D008961:Models, Structural; D009502:Neutrons; D012542:Scattering, Radiation
D002130:Calcium Phosphates; D002364:Caseins; D003102:Colloids; D008823:Micelles; C485828:alpha-tricalcium phosphate; C485830:tetracalcium phosphate; C485838:calcium phosphate, monobasic, anhydrous; C020243:calcium phosphate; C485829:calcium phosphate, dibasic, anhydrous