Raman spectrum of a transfer RNA

Raman spectrum of purified formylmethionine transfer RNA from Escherichia coli has been observed in its aqueous solution. In the 1800 to 200 cm(-l) range, about 30 Raman lines are found, each of which can be assigned to one of the constituent nucleotide residues. From the positions and intensities of the lines, information on the intramolecular environments of these base residues can be obtained.

Phosphorus-Proton Spin-Spin Coupling and Conformation of a Dinucleoside Phosphate

The phosphorus-31 nuclear magnetic resonance spectrum of beta-adenosine-3'-beta-adenosine-5'-phosphoric acid in its aqueous solution (pH = 9.2) was studied. The signal consisted of eight peaks caused by the spin-spin coupling of the phosphorus nucleus with three protons, two on the 5' carbon, and one on the 3' carbon. The coupling constants were 3.4, 6.5, and 8.1 hertz; from these values the dihedral angles of the three P-O-C-H systems were estimated.