The 23S rRNA of Agrobacterium tumefaciens contains at least two nicks which result in the formation of RNA components with mol.wts. of 0.52 X 10(6) and 0.48 X 10(6). Thus under the usual conditions of extraction and analysis, no 23S rRNA was recovered from the bacterium. The experiments show that 23S rRNA is synthesized as a continuous chain, in which one or two nicks are formed almost immediately near the ends of the molecule and an additional nick in the middle at a later time.
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