Method for isolating RNA with high yield
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United States of America Patent
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Aug 15, 2023
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Sep 27, 2017
filing date -
Sep 27, 2017
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Abstract
A phenol-free method for isolating a nucleic acid from a sample is provided, said method comprising the following steps: a) adding a precipitation buffer to a sample to prepare an acidic precipitation mixture wherein said precipitation buffer comprises a metal cation precipitant and a buffering agent, has a pH value of 4.0 or less and does not comprise an organic solvent selected from aprotic polar solvents and protic solvents and wherein the acidic precipitation mixture comprises the metal cation precipitant in a concentration of less than 200 mM and precipitating proteins; b) separating the precipitate from the supernatant, wherein the supernatant comprises small RNA having a length of less than 200 nt and large RNA having a length of at least 1000 nt; and c) isolating a nucleic acid from the supernatant. The present method allows to avoid the use of organic solvents during protein precipitation. Also provided is a precipitation buffer.
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