Complexes of polyadenylic acid and 7-methyl-xanthine and their optical rotatory dispersion |
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| Authors: | R J Davies |
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| Institution: | Biochemistry Department, Medical Biology Centre, The Queen''s University of Belfast, Belfast, BT9 7BL, Northern Ireland. |
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| Abstract: | Polyadenylic acid forms a 2:1 complex with 7-methyl-xanthine at pH 7.0, 0.15 M Na+, and a 1:1 complex at pH 6.0, 0.15M Na+. The complexes have been characterized by equilibrium dialysis and by ORD measurements. Both complexes are laevorotatory at wavelengths greater than 286 nm, and the 1:1 complex is remarkably optically active: m] = ?154,000° at 292 nm. The properties and structures of the complexes are discussed. |
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