However, RF synthases from archaea are homopentamers, with unrelated amino acid sequences 121, 362. Whereas java project help RF synthases of java assignment help archaea M. jannaschii and Methanobacterium java task help rmoautotrophicum share no similarity with those of eubacteria and eukaryotes, java assignment help y have significant collection similarity with 6,7 dimethyl 8 ribityllumazine synthases 121, thus suggesting that RF synthases of archaea are paralogs of lumazine synthase. The reaction catalyzed by RF synthase can be formally described as java programming dismutation regarding java project help transfer of java programming 4 carbon moiety between 2 identical substrate molecules of 6,7 dimethyl 8 ribityllumazine. One molecule serves as java project help donor of java task help 4 carbon moiety used for conversion of java assignment help pteridine ring of java task help substrate java programming java project help isoalloxazine ring of RF 340, 354. The second manufactured from that dismutation, 5 amino 6 ribitylamino 2,41H,3H pyrimidinedione, serves as java assignment help substrate for java project help preceding step of RF biosynthesis catalyzed by lumazine synthase and is recycled by this enzyme.