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Differences between the transfer ribonucleic acid (tRNA) of spores and exponentially growing cells ofBacillus subtilis 168 were compared by co-chromatography on reversed-phase column RPC-5. This system gave excellent resolution of isoaccepting species in 1 to 2 hr using a 200-ml gradient. Two methods were used to extract spore tRNAs, a procedure using a Braun homogenizer and a pretreatment with dithiothreitol followed by lysis with lysozyme. Where changes were observed, column elution profiles of spore tRNAs were independent of the extraction method used. Three kinds of changes between the profiles of vegetative cell tRNA and spore tRNA were observed: (i) no change; phe-, val-, ala-, asp-, ileu-, pro-, met-, fmet-, and his-tRNAs, (ii) a change in the ratio of existing peaks; gly-, tyr-, leu-, ser-, thr-, aspn-, and arg-tRNAs, and (iii) the appearance or disappearance of unique peaks; lys-, glu-, and trp-tRNAs.

journal of bacteriology

Analysis of Isoaccepting Transfer Ribonucleic Acid Species of <i>Bacillus subtilis</i> : Chromatographic Differences Between Transfer Ribonucleic Acids from Spores and Cells in Exponential Growth

Analysis of Isoaccepting Transfer Ribonucleic Acid Species of Bacillus subtilis : Chromatographic Differences Between Transfer Ribonucleic Acids from Spores and Cells in Exponential Growth