An isogenic enzyme was a type of natural catalyst produced by organisms. Ketracel-white was an addictive narcotic containing an isogenic enzyme and nutrients. (DS9: "The Abandoned") According to the script for "The Abandoned", isogenic was pronounced as "EYE-so-gin-ik". [1] In the comic book The Looking Glass War, Lieutenant Jadzia Dax uses a derivative of the isogenic enzyme found in ketracel-white to incapacitate the Jem'Hadar crew of a Dominion space station.