8RZI
ZgGH129 from Zobellia galactanivorans soaked with 1,2-diF-ADG (3,6-Anhydro-2-deoxy-2-fluoro-a-D-galactopyranosyl fluoride) resulting in a trapped glycosyl-enzyme intermediate.
Ribonucleoside-diphosphate reductase subunit M2 B - Homo sapiens