Fig. 5 shows the protein contents as a function of DOM.
The protein content (9.2%) of brown rice (DOM = 0%)
decreased as a function of DOM, indicating that the protein
concentration in bran layers decreased from the rice
surface to the endosperm. Also, the fact that the protein
content decreased further after bran removal
(DOM > 9%) suggests that proteins were not homogeneously
distributed in the endosperm. The protein concentration
decreased from the outer to the core endosperm.