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Abstract

The present invention pertains inter alia to a method for isolating poly(A) nucleic acids having a single stranded poly(A) stretch from a nucleic acid containing sample comprising: (a) providing a hybridization composition comprising: i) a nucleic acid containing sample; ii) a hybridization solution comprising: aa. a sodium salt; bb. a quaternary ammonium salt; wherein the components of the hybridization solution can be added as single solution to the sample or may be added separately in any order to the sample; iii) a capture probe capable of hybridizing to the poly(A) stretch of the poly(A) nucleic acids; and incubating said hybridization composition under conditions to form nucleic acid-hybrids between the poly(A) nucleic acids and the capture probe; (b) separating the formed hybrids from the remaining sample. The method is in particular suitable for efficiently isolating poly(A) RNA from various samples while avoiding carry-over of unwanted non-poly(A) nucleic acids such as rRNA. Also provided are advantageous further methods, hybridization solutions and kits.

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First Claim