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Start Over You searched for: Language English ✖ Remove constraint Language: English Format Text ✖ Remove constraint Format: Text Subject DNA ✖ Remove constraint Subject: DNA Subject Crystallography, X-Ray ✖ Remove constraint Subject: Crystallography, X-Ray Genre Letters (correspondence) ✖ Remove constraint Genre: Letters (correspondence) Publisher New York Academy of Sciences ✖ Remove constraint Publisher: New York Academy of Sciences