MRD was assessed using polymerase chain reaction analysis of Ig / TCR gene rearrangements. (cancernetwork.com)
These are the Real Time Polymerase Chain Reaction Tests (RT - PCR) that identify minute amounts of pathogen genetic material without having to grow the organisms in the laboratory. (2ndchance.info)
The replicon made copious copies of itself, which the researchers showed both by polymerase chain reaction assays and by analyzing viral proteins. (sciencemag.org)