Mustard greens that have been genetically altered to remove their pungent flavor are coming to U.S. grocery stores. STORY AT-A-GLANCE Pairwise, an agricultural biotechnology company, created Conscious Greens Purple Power Baby Greens Blend, the first CRISPR-edited food available to U.S. consumers. The company used CRISPR—clustered regularly interspaced short palindromic repeats—to edit mustard greens’ DNA, removing…