If RNA fragmentation is not required, what is the purpose of heating RNA at 72oC?

If RNA fragmentation is not required, what is the purpose of heating RNA at 72oC?

Incubation at 72oC unwinds RNA secondary structure, allowing random primer annealing, performed in the absence of the 5X First -Strand Buffer (containing Mg++) to avoid RNA fragmentation.

Stranded RNA-seq for mammalian samples

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