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Zejin Yang, Patrick Duffy and Feng Wang Inheritance and correlation of nucleic acid pyrimidine bases International Journal of Quantum Chemistry 113

Version of Record online: 21 MAY 2013 | DOI: 10.1002/qua.24453

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Orbital momentum distributions reveal that pyrimidine exhibits less similarity to the nucleic acid (NA) bases (cytosine, thymine, and uracil) than the NA bases do to each other. The high symmetry of pyrimidine restricts interchanges between the x- and y-components of its orbitals, whereas the NA bases are more flexible as they do not possess such symmetry restriction. This may be one reason that pyrimidine does not appear in most of the RNA and DNA polymers.

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