When Mullis developed the PCR in 1983, he was working in Emeryville, California for Cetus Corporation, one of the first biotechnology companies, where he was responsible for synthesizing short chains of DNA.
Ao mesmo tempo que se desenvolvía a PCR en 1983, Mullis traballaba en Emeryville, California (EE UU), para unha das primeiras empresas biotecnolóxicas, Cetus Corporation, onde era responsable de sintetizar cadeas curtas de ADN.