Talk:Ken Kaneki/@comment-26232562-20150501165732/@comment-25047329-20150501171925

They don't directly mention the compatability thing, it's more implied through what Kanou is trying to do. Like during the "Raid of Kanou's Lab" arc, Kanou is over looking one of his test subjects that begin to fail. At that point he was already trying "recreate Kaneki" (or at the very least, replicate the formula) and mentioned that blood type wasn't a related factor.