Mitochondrial ROS production and oxidative mtDNA damage is increased during reoxygenation in the GPX1 knockout mice, in addition to structural abnormalities in cardiac mitochondria and myocytes, suggesting GPX1 may play an important role in protecting cardiac mitochondria from reoxygenation damage in vivo.
12.
The resulting sediments supplied to the ocean would be high in nutrients such as phosphorus, which combined with the abundance of would trigger a cyanobacteria population explosion, which would cause a relatively rapid reoxygenation of the atmosphere, which may have contributed to the rise of the Ediacaran biota and the subsequent Cambrian explosion a higher oxygen concentration allowing large multicellular lifeforms to develop.
