Three Forms of the 5.8‐S Ribosomal RNA Species in Saccharomyces cerevisiae

The existence of three stable forms of the 5.8‐S ribosomal RNA species in Saccharomyces cerevisiae has been demonstrated. The major form constitutes approximately 90% of the total 5.8‐S RNA and the two minor forms each constitute approximately 5%. The nucleotide sequence of the major form begins pA‐A‐A‐Cp. The sequences of the minor forms begin pU‐A‐U‐U‐A‐A‐A‐A‐A Cp and pA‐U‐A‐U‐U‐A‐A‐A‐A‐A‐Cp. The remainders of the sequence of all three forms appear to be identical.