Before revision: After that, it undergoes enzymatic permeabilization, so that RNA molecules can diffuse down to the slide, with further hybridization of polyadenilated mRNA molecules to the oligo (dT) probes.
After revision: After that, it undergoes enzymatic permeabilization, so that RNA molecules can diffuse down to the slide, with further hybridization of polyadenylated mRNA molecules to the oligo (dT) probes.