Nursery rhyme rhymes became associated with the idea of political correctness. Most attempts to reform nursery rhymes on this basis appear to be either very small scale, light-hearted updating, like Felix Dennis's "When Jack Sued Jill – Nursery Rhymes for Modern Times" (2006), or satires written as if from the point of view of political correctness in order to condemn reform. The controversy in Britain in 1986 over changing the language of "Baa Baa Black Sheep" because, it was alleged in the popular press, it was seen as racially dubious, was apparently based only on a rewriting of the rhyme in one
S-ribosylhomocysteine lyase S-ribosylhomocysteine lyase In enzymology, a S-ribosylhomocysteine lyase () is an enzyme that catalyzes the chemical reaction Hence, this enzyme has one substrate, S-(5-deoxy-D-ribos-5-yl)-L-homocysteine, and two products, L-homocysteine and (4S)-4,5-dihydroxypentan-2,3-dione. This enzyme belongs to the family of lyases, specifically the class of carbon-sulfur lyases. The systematic name of this enzyme class is S-(5-deoxy-D-ribos-5-yl)-L-homocysteine L-homocysteine-lyase [(4S)-4,5-dihydroxypentan-2,3-dione-forming]. Other names in common use include S-ribosylhomocysteinase, and LuxS. This enzyme participates in methionine metabolism. Furthermore, LuxS is involved in the synthesis of autoinducer AI-2 (autoinducer-2), which plays a role in quorum sensing in a certain number of bacterial species. LuxS converts S-ribosylhomocysteine to homocysteine and