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According to the study, two distinct clades arose within the species at different times, supporting a pattern of repeated expansion and localized extinction.
The genomes of four children who died in Cameroon 3,000 to 8,000 years ago pointed to diverse early lineages and helped tease out historical population relationships.
By combining mitochondrial DNA and climatic data, an international team of researchers found that an early mitochondrial lineage emerged in a paleo-wetland.
The researchers traced the timing of when these clusters developed to the emergence of agriculture in three river valleys.
With ancient mitochondrial sequences from all seven Canary Islands, researchers identified at least two early migrations involving shifting populations from North Africa.
Researchers have uncovered three families in which individuals inherited mitochondrial DNA from their fathers, upending existing belief.
By sequencing a handful of individuals who lived in Morocco some 13,900 to 15,100 years ago, investigators found clues to past population mergers in North Africa.
A mitochondrial genome- and Y chromosome marker-based analysis suggests the Chachapoyas population was not completely replaced by Incas as previously believed.
University of Pennsylvania researchers sequenced single mitochondria, which they noted could be used to track the development of mitochondrial disease.
The US-based team that performed mitochondrial replacement therapy publishes its approach; editorial describes its weaknesses.
An analysis of blood donations suggests SARS-CoV-2 was present in the US weeks earlier than thought, according to NPR.
The Guardian reports that DeepMind Technologies' AlphaFold can predict how proteins fold.
CNBC reports that a US Centers for Disease Control and Prevention advisory panel is to vote on how to distribute COVID-19 vaccines.
In PNAS this week: targeting progesterone signaling in ovarian cancer, LINE-1 retrotransposition events in adenocarcinomas, and more.