I can’t seem to find any reliable source for these ingredients. I’m searching mainly on government nutritional database such as USDA Food Data Central, but with no luck.
LMGTFY:
Brown rice protein is a protein supplement made from brown rice. To convert into powder form, the brown rice is treated with select enzymes that cause the protein and carbohydrates that make up the rice to separate. The protein is isolated, resulting in a protein powder
Pea protein is, as you may have guessed it, derived from yellow split peas that are dried then ground up into a fine flour. But it doesn’t stop there; the pea flour is then mixed with water and most of the starch and fiber content is removed before the paste is dried again and ground into a fine powder.