A Versatile and Convenient Synthesis of 34 S-Labeled Phosphorothioate Oligonucleotides.
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ABSTRACT: A synthetic protocol for 34 S-labeled phosphorothioate oligonucleotides (PS ONs) was developed to facilitate MS-based assay analysis. This was enabled by a highly efficient, two-step, one-pot synthesis of 34 S-labeled phenylacetyl disulfide (34 S-PADS), starting from 34 S-enriched elemental sulfur (34 S8 ). 34 S-PADS was subsequently used for stable isotope labeling (SIL) of oligonucleotides containing a phosphorothioate backbone. The 34 S-SIL PS ONs are shown to retain the same melting temperature, antisense activity, and secondary structure as those of the corresponding unlabeled 32 S PS ONs.
SUBMITTER: Stulz R
PROVIDER: S-EPMC6585993 | biostudies-literature |
REPOSITORIES: biostudies-literature
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