In the mutant mice there was no new pattern of cellular activity in either situation, indicating they believed the novel cage was the shock chamber. (scientificamerican.com)
The major part of the energy necessary for cellular activity is provided by mitochondria. (sciencedaily.com)
These mutations can be caused by multiple events, some from normal cellular activities and some from environmental harm, such as UV light or chemicals. (en.hdbuzz.net)