Specific Oligoribonucleotide Synthesis Using Primer-Independent Polynucleotide Phosphorylase

Abstract
Oligoribonucleotides of a predetermined base sequence begin-ing with adenylyl-3′ 5′-adenosine at the 5′ end have been synthesized in yields varying between 13% and 42%. The synthesis was carried out using primer-independent polynucleotide phosphory-lase from E. coli in the presence of high concentrations of primer and of sodium chloride.