1MIO | A:54-196; C:54-196; A:2-53,A:333-519; C:2-53,C:333-519; B:22-162; D:22-162; A:197-308; C:197-308; B:163-266; D:163-266; B:313-410; D:313-410 | X-RAY CRYSTAL STRUCTURE OF THE NITROGENASE MOLYBDENUM-IRON PROTEIN FROM CLOSTRIDIUM PASTEURIANUM AT 3.0 ANGSTROMS RESOLUTION |