Word: apolipoprotein
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Dates: during 1995-1995
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...Calment's mother lived to 86, her father to 93. Scientists speculate that long-lived people may carry genes that confer special resistance to the assault of free radicals, chemical residues of metabolism that do increasing damage to DNA as the years roll by. Researchers are also looking at apolipoprotein E, a substance that ferries cholesterol to and from cells. People vulnerable to Alzheimer's and heart disease tend to have a certain type of gene for this protein, while those who live longest tend to have another type...
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