>2RC3_1|Chains A, B, C, D|CBS domain|Nitrosomonas europaea ATCC 19718 (228410) FQGHMKTVKHLLQEKGHTVVAIGPDDSVFNAMQKMAADNIGALLVMKDEKLVGILTERDFSRKSYLLDKPVKDTQVKEIMTRQVAYVDLNNTNEDCMALITEMRVRHLPVLDDGKVIGLLSIGDLVKDAISQHQF