Passing fancies

This time we are looking on the crossword clue for: Passing fancies.
it’s A 15 letters crossword puzzle definition. See the possibilities below.

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Possible Answers: FADS, WHIMS.

Last seen on: –L.A. Times Daily Crossword – Dec 10 2022
Newsday.com Crossword – Jan 30 2019

Random information on the term “FADS”:

In enzymology, a FMN adenylyltransferase (EC 2.7.7.2) is an enzyme that catalyzes the chemical reaction

Thus, the two substrates of this enzyme are ATP and FMN, whereas its two products are diphosphate and FAD.

This enzyme belongs to the family of transferases, specifically those transferring phosphorus-containing nucleotide groups (nucleotidyltransferases). The systematic name of this enzyme class is ATP:FMN adenylyltransferase. This enzyme participates in riboflavin metabolism.

Other names in common use include

FADS on Wikipedia