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Christophe Merieux, David King, Thomas MacMahon, Brock Siegel, John Tonkinson

Christophe Mérieux, BioMérieux's vice president of research and development, died July 14 after a heart attack, according to news reports. He was 39.
He was also the head of Transgene, the company's Strasbourg, France-based subsidiary. Transgene said that Michel Dubois would take Mérieux's seat as chairman of the board.
His father, Alain Mérieux, currently CEO of bioMérieux,was set to hand over control of the company to him in the next two years.

David King will succeed Thomas MacMahon as CEO of Laboratory Corporation of America Holdings, the company said this week.
The succession will occur on Jan. 1, 2007. King will also join the board of directors on that date.
MacMahon will continue to serve as the board's chairman until the annual shareholders' meeting in 2008.
The directors also approved Bradford Smith's appointment as board vice chairman, also effective Jan. 1.
King joined LabCorp in 2001 after many years as the company's outside counsel. Since 2005, he has served as executive vice president and chief operating officer. He headed the Esoterix and US Labs businesses, where he was executive vice president of strategic planning and development.

Solexa named Brock Siegel as chief operating officer last week.
Siegel spent the last 15 years with Applied Biosystems in a variety of senior management positions. Most recently he was vice president of quality and process excellence. Prior to ABI he was at Millipore and Henkel Research.
Siegel was a professor of bioorganic chemistry and chemical engineering at the University of Minnesota and did his postdoc at Columbia University. He received a PhD from the University of Illinois and a BS in chemistry from Syracuse University.

HistoRx named John Tonkinson as vice president of business development, the company said last week.
Tonkinson was recently director of business development at Epitome BioSystems. Prior to that he was director of sales and scientific services at Schleicher & Schuell BioScience.

He received his PhD, MPhil, and MA degrees in biochemistry and molecular biophysics from Columbia University. He earned his BS in biochemistry from Philadelphia College of Pharmacy and Science. He completed his postdoctoral training at Eli Lilly.

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The Scan

Pig Organ Transplants Considered

The Wall Street Journal reports that the US Food and Drug Administration may soon allow clinical trials that involve transplanting pig organs into humans.

'Poo-Bank' Proposal

Harvard Medical School researchers suggest people should bank stool samples when they are young to transplant when they later develop age-related diseases.

Spurred to Develop Again

New Scientist reports that researchers may have uncovered why about 60 percent of in vitro fertilization embryos stop developing.

Science Papers Examine Breast Milk Cell Populations, Cerebral Cortex Cellular Diversity, Micronesia Population History

In Science this week: unique cell populations found within breast milk, 100 transcriptionally distinct cell populations uncovered in the cerebral cortex, and more.