1.14.13.160 FAD - 1.14.13.160 FAD Crystallization data. With the exception of the O2' atom of ribose and the C-8 and N-9 atoms of adenine, the FAD cofactor is completely buried and inaccessible to the solvent 1.14.13.160 FAD single molecule of FAD per dimer 1.14.13.160 FAD one molecule per enzyme molecule 1.14.13.160 NADPH specific for 1.14.13.160 NADPH specific for NADPH