Nucleic Acids Research, 1975, Vol. 2, No. 10 1931-1940
© 1975
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Distribution of the modified nucleoside Q and its derivatives in animal and plant transfer RNA's
Biology Division, National Cancer Center Research Institute Tokyo, Japan
Received September 4, 1975. The modified nucleoside, 7-(4,5-cis-dihydroxy-l-cyclopenten-3-yl-aminomethyl)-7-deazaguanosine, designated as Q, and its derivative, Q*, were found in tRNA's from various organisms, including several mammalian tissues, other animals such as starfish, lingula and hagfish, and wheat germ.
Q isolated from rat liver tRNA was found to be identical with E. coli Q by mass spectrometry and thin-layer chromatography. Thus the rare modified nucleoside Q originally isolated from E. coli tRNA, is widely distributed in various organisms. Analysis of the mass spectrum of Q* suggested that it has a different side chain from Q.
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