Abstract
A plasmid containing the intergenic spacer (IGS) region from Vicia fabaL. ribosomal RNA genes was introduced into Escherichia coli in order to study recombination within the IGS. Recombination occurred in a recA + (RR1) but not in a recA − (HB101) strain. We conclude that the IGS length heterogeneity found in V. faba may result from recombination events involving an analog of the Rec A protein.
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