| Literature DB >> 14612563 |
Joseph R Roscioli1, David W Pratt.
Abstract
A rotationally resolved electronic spectrum of the gas-phase dimer 2-aminopyridine.2-pyridone, an analog of the adenine.thymine base pair, has been observed and assigned, leading to precise measurements of its moments of inertia and preliminary determinations of its structure. A Watson-Crick configuration results, with N...H-N and N-H...O hydrogen bond lengths of 2.898 and 2.810 A, respectively. The two bases are found not to be coplanar; a dihedral angle of 6.1 degrees between the base planes is also estimated from the measured moments of inertia. Possible chemical and biological implications of these results are discussed.Entities:
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Year: 2003 PMID： 14612563 PMCID： PMC283493 DOI： 10.1073/pnas.2333806100
Source DB: PubMed Journal: Proc Natl Acad Sci U S A ISSN： 0027-8424 Impact factor: 11.205