Laboratory reagents for research purposes; enzyme and enzyme preparations for research purposes; polymerase chain reaction (PCR) reagents for research purposes; polymerase chain reaction (PCR) enzymes for research purposes; reverse transcriptions enzymes for research purposes; reagent polymerase chain reaction (PCR) master mixes, namely, pre-mixed reactants and reagents for research purposes; all the following sold individually or together as a kit, for quantitative polymerase chain reaction ...