“Native cells have an adaptation, organelles that appear similar in basic structure to our mitochondria. They reproduce to their own schedule, have their own genetic material, and appear to serve no other purpose than cleansing cellular debris. But when implanted into human cells, these organelles self-terminate. I’ve modified the human tissue to prevent rejection, it isn’t that. It’s more like… a security measure. Like they know they’re in the wrong sort of tissue, so they die.”