Jack and Jill (nursery rhyme) these stanzas were viewed as quatrains with internal rhymes, this would be an example of ballad form, a common form for nursery rhymes. The melody commonly associated with the rhyme was first recorded by the composer and nursery rhyme collector James William Elliott in his "National Nursery Rhymes and Nursery Songs" (1870). The Roud Folk Song Index, which catalogues folk songs and their variations by number, classifies the song as 10266. The phrase "Jack and Jill" was in use in England as early as the 16th century to indicate a boy and a girl. A comedy with the title "Jack
(S)-canadine synthase (S)-canadine synthase In enzymology, a (S)-canadine synthase () is an enzyme that catalyzes the chemical reaction The 4 substrates of this enzyme are (S)-tetrahydrocolumbamine, NADPH, H, and O, whereas its 3 products are (S)-canadine, NADP, and HO. This enzyme belongs to the family of oxidoreductases, specifically those acting on paired donors, with O as oxidant and incorporation or reduction of oxygen. The oxygen incorporated need not be derived from O with NADH or NADPH as one donor, and the other dehydrogenated. The systematic name of this enzyme class is (S)-tetrahydrocolumbamine,NADPH:oxygen oxidoreductase (methylenedioxy-bridge-forming). Other names in common use include (S)-tetrahydroberberine synthase,