denaturing protein aids digestion
Evolving Bigger Brains through Cooking: A Q&A with Richard Wrangham: Scientific American
taken from the article by Harvard Professor Richard Wrangham
"which show that digestibility of animal protein increases when it is cooked. And that's because it's denatured—the protein is unfolded. It's normally packed solid, with the hydrophobic groups on the inside, the hydrophilic groups on the outside. Denaturation is the process of it opening out. And once it opens out, the proteolytic enzymes can now go in and start snipping. Heat predictably causes denaturation, so one of the major effects of cooking is to denature proteins, opening them up to the point where proteolytic enzymes have easier access."
i consider an article on Scientific American by a Harvard Professor to be quite valid
whether or not the microwave causes changes to proteins OTHER than denaturation is still up for debate. but as the original statement indicates studies show it denatures them, then i will use the microwave more often!!