Sequences used to construct primers and primer target sites are given in Fig. 1. PCR reactions with the newly designed subfamily I.2.C-specific primers were performed in 50 L reactions containing 5 L of 10× Mg-free PCR buffer, 2 mM MgCl2, 0.6 M of each primer, 0.2 mM of each dNTP, 4 L RT mix, 1 U Maxima Hot Start Taq DNA Polymerase (Thermo Scientific) and nuclease-free water
up to the final reaction volume.