... Dueren, Germany). For cDNA synthesis, the first-strand synthesis kit for RT-PCR (Invitrogen) was used.Hybridization probe, cloning and heterologousexpressionStandard molecular and biochemical ... substrate other than sulfide and quinone, and, for the SQR from S. pombe, cyanide-independentactivity has been described [27]. However, the Kmvalues for sulfide and quinone of 2 mm reported for S. ... and other marine invertebrates, such as the ribbed mussel Geukensia demissa, are sulfide toler-ant [5], however, and can even use electrons from sulfide for mitochondrial ATP production [6]. The electrons...