PCR enzyme. The more you use, the cheaper it gets.
Aldhous
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P
D003365:Costs and Cost Analysis; D004259:DNA-Directed DNA Polymerase / Q000191:economics* / Q000600:supply & distribution; D004345:Drug Industry / Q000191:economics*; D010330:Patents as Topic; D016133:Polymerase Chain Reaction / Q000191:economics*; D013557:Switzerland; D019914:Taq Polymerase; D014481:United States
D019914:Taq Polymerase; D004259:DNA-Directed DNA Polymerase