Figure 4.
Phosphorimage of reverse transcriptase products of the radiolabeled primer complementary to residues 548–569 (E. coli numbering). C, U, A and G indicate (dideoxy-)sequencing lanes, wt. + CMC: CMC derivatized and alkali treated 16S rRNA purified from C. acetobutylicum bacteria. wt. − CMC: alkali treated 16S rRNA purified from C. acetobutylicum bacteria. In vitro: T7 RNA polymerase transcribed 16S rRNA from the cloned 16S rRNA gene. Arrows indicate bands corresponding to modified nucleosides or secondary structure.