ALEXANDRIA, Va., Sept. 23 -- United States Patent no. 12,421,509, issued on Sept. 23, was assigned to Codexis Inc. (Redwood City, Calif.).

"Engineered phosphopentomutase variant enzymes" was invented by Scott J. Novick (Palo Alto, Calif.), Xiang Yi (San Carlos, Calif.), Nikki Dellas (San Carlos, Calif.), Oscar Alvizo (Fremont, Calif.), Jovana Nazor (Milpitas, Calif.), Da Duan (Foster City, Calif.), Vesna Mitchell (Santa Clara, Calif.), Jonathan Vroom (South San Francisco, Calif.), Santhosh Sivaramakrishnan (Redwood City, Calif.), Nandhitha Subramanian (Milton Keynes, Great Britain), Jeffrey C. Moore (Westfield, N.J.), Mark Huffman (Rahway, N.J.), Agustina Rodriguez-Granillo (Rahway, N.J.), Deeptak Verma (Rahway, N.J.), Grant S. Murphy (Rah...