It's possible to get complete protein by combining two or more incomplete sources?

It's possible to get complete protein by combining two or more incomplete sources?

Answer:

Incomplete proteins are low in one or more essential amino acids, but they can still be important sources of protein, especially if you combine proteins that are "complementary" (that is, when eaten together, they supply all nine essential amino acids).  Rice and beans, and peanut butter and whole wheat bread, are examples.  Strict vegetarians should pay special attention to which protein combinations are complementary.

 

It was once thought that you had to eat complementary proteins as part of the same meal for your body to process them as a complete protein.  More recent research suggests you only need to eat them on the same day.

http://www.m.webmd.com/fitness-exercise/rm-quiz-protein-myths-facts?ecd=wnl_alt_020114&ctr=wnl-alt-020114_ld-stry_1&mb=