You sound like a dietition. Did you get that out of your local libraries text book section?
Dr. Peter Lemon, the worlds foremost authority on protien, has dispelled these BS rumors in numerous scientific publications.
The most simple way to figure out how much protien the body can absorb is this. Go ask a pro BB how much protien he takes in. Most likley he will tell you somewhere between 2.5-4gms/LB of body weight. Then ask him what would happen to his muscle mass if he only took the RDA. Bye Bye Mr. O title! That's what!
And it has everything to do with what type of training you're doing, what gear your on and so on and so forth.
Sorry if this sounds like a flame, it's not intended to be, but you need to do some more homework.