A Nonradioactive Assay for Poly(A)-Specific Ribonuclease Activity by Methylene Blue Colorimetry
Abstract:A simple nonradioactive assay, which was based on the specific shift of the absorbance maximum of methylene blue induced by its intercalation into poly(A) molecules, was developed for poly(A)-specific ribonuclease (PARN). A good linear relationship was found between the absorbance at 662 nm and the poly(A) concentration. The assay conditions, including the concentration of methylene blue, the incubation temperature and time, and the poly(A) concentration were evaluated and optimized.
Document Type: Research Article
Affiliations: Life Science Division, Graduate School at Shenzhen, Tsinghua University, Shenzhen 518055, China.
Publication date: 2006-02-01
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