RNA identity method using RNAse H digestion and size fractionating

A process of manufacturing a vaccine product comprising a subject RNA, the process comprising the steps of:

• (a) manufacturing an RNA from a template DNA and obtaining a sample of the RNA;
• (b) confirming the identity of the RNA in the sample as that of the subject RNA using a method comprising the steps of:
• (A) contacting the sample with a query nucleic acid consisting of a DNA oligonucleotide complementary to a portion of the subject RNA under conditions that the query DNA oligonucleotide specifically hybridizes with the subject RNA vaccine product, when present, to form a hybrid duplex, wherein the formation of the hybrid duplex is carried out at a temperature between 0-10° C.;
• (B) adding an enzyme consisting of RNAse H to the sample under conditions that facilitate specific cleavage of the subject RNA vaccine product when the hybrid duplex is present;
• (C) size fractionating of the sample by denaturing agarose gel electrophoresis and determining the presence of cleaved subject RNA vaccine product by detecting all cleavage products of the subject RNA vaccine product,
• wherein said method can distinguish between a subject RNA vaccine product and a RNA sharing at least 80% sequence homology,
• wherein the identity of the RNA is confirmed as that of the subject RNA where (i) all cleavage products of the subject RNA vaccine product are of predicted size and (ii) contaminating template DNA uncleaved products are not detected;
• and
• (D) utilizing the vaccine product if the identity of the RNA is confirmed.