1.5.1.27 DNA and amino acid sequence determination and analysis, the genetic locus, designated STORR [(S)- to (R)-reticuline] encodes both cytochrome P450 and oxidoreductase modules 1.5.1.27 gene PrDRR, genetic map, recombinant expression of His-tagged enzyme in Saccharomyces cerevisiae 1.5.1.27 gene PsDRR1, genetic map, recombinant expression of His-tagged enzyme in Saccharomyces cerevisiae