This enzyme belongs to the family of oxidoreductases, specifically those acting on the CH-CH group of donor with NAD+ or NADP+ as acceptor. The systematic name of this enzyme class is acyl-CoA:NAD+ trans-2-oxidoreductase. This enzyme is also called trans-2-enoyl-CoA reductase (NAD+). This enzyme participates in butanoate metabolism.
Inui H, Miyatake K, Nakano Y, Kitaoka S (October 1986). "Purification and some properties of short chain-length specific trans-2-enoyl-CoA reductase in mitochondria of Euglena gracilis". J. Biochem. Tokyo. 100 (4): 995–1000. PMID3102464.