The Specificity of Ribonuclease T2*

Abstract
RNase T2 [EG 2.7.7.17] has no absolute specificity as regards nucleotide bases, although it shows a preference for adenylic acid linkages in RNA. On exhaustive digestion with RNase T2, ribonucleic acids and homopolynucleotides are quantitatively digested to produce nucleoside 3'-phosphate. In the partial digestion of RNA with RNase T2, some phospho-diester bonds of Ap in RNA are preferentially split to produce the large fragments terminating with Ap in the very early stage of digestion, while few of the other nucleotide bonds are split. The susceptibility to RNase T2 is different depending on the molecular conformation of the substrates used.

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