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NEW YORK — A letter that scientist Francis Crick wrote to his son about his Nobel Prize-winning DNA discovery was sold to an anonymous buyer at a New York City auction Wednesday for a record-breaking $5.3 million.

The price, which exceeded the $1 million presale estimate, topped $6 million when the commission is included, according to Christie’s. The price was a record for a letter sold at auction, Christie’s said, eclipsing an Abraham Lincoln letter that sold in April 2008 for $3.4 million, including commission.

The molecular biologist’s 1962 Nobel Prize medal in physiology or medicine will be offered Thursday by Heritage Auctions, which estimates it could fetch more than $500,000.

The items are among a dozen artifacts Crick’s heirs are selling to benefit scientific research.

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In the March 19, 1953, handwritten letter to his 12-year-old son, Michael, Crick describes his discovery of the structure of DNA as something “beautiful.” The note tells his son how he and James Watson found the copying mechanism “by which life comes from life.” It includes a simple sketch of DNA’s double-helix structure, which Crick concedes he can’t draw very well.

The seven-page letter, written to his son in boarding school, concludes: “Read this carefully so that you will understand it. When you come home we will show you the model. Lots of love, Daddy.”

Crick, who died in 2004 at 88, was awarded the Nobel Prize along with Watson and Maurice Wilkins. He spent the latter decades of his career doing brain research at the Salk Institute, where he became a professor in 1977.

Michael Crick, of Bellevue, was in New York to attend the auctions.

His daughter, Kindra, said the family decided to sell the medal and other items because they had been in storage for 50 years, first locked up in a room of her grandfather’s La Jolla, Calif., home and later in a safe-deposit box.

They chose to sell them now because it “coincides with the 60th anniversary of the historic discovery and 50 years since he received the award,” she said.

Half the proceeds from the Christie’s sale will benefit the Salk Institute for Biological Studies in La Jolla, the granddaughter said. Twenty percent of the proceeds from the Heritage Auctions sale will go to the new Francis Crick Institute in London, a medical-research institute scheduled to open in 2015.

Michael Crick
said the family hoped the prospective buyers “will give people the opportunity to look at them and that they will be an inspiration for future scientists.”

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