Abstract
Previous studies concerning the analysis of retroviral tRNA populations involved intracellular metabolic labeling of RNA, followed by the isolation of viral RNA and lengthy sucrose gradient centrifugation for the separation of tRNAs found in various viral compartments. A more rapid, convenient, and safer method for achieving similar aims is described. Isolated total viral RNA is end-labeled in vitro, and tRNA subgroups are fractionated using commercial Nucleobond AX-20 mini columns. 2-D PAGE analysis of mouse mammary tumor virus tRNA fractionated in this way yields gel patterns similar to those obtained with previously described methods.
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