5IM5_1|Chains A, B, C, D, E, F, G, H, I, J, K, L[auth M], M[auth O], N[auth Q], O[auth S]|Designed Riboflavin synthase|Methanocaldococcus jannaschii (strain ATCC 43067 / DSM 2661 / JAL-1 / JCM 10045 / NBRC 100440) (243232) label=1