“…The assay has a sensitivity of 5.14 nm/mM of cholesterol, and the limit of detection is rather high (1.1 mM). Jensen and co-workers describe an enzymatic FOBS using unmodified Escherichia coli BL21 (DE3) pGELAF+ for sensing the pollutant 1,2-dichloroethane (1,2-DCE). A pH optode was used as the signal transducer because 1,2-DCE is decomposed under formation of acid.…”