>sp|D9PX81|RIBL_METTM FAD synthase OS=Methanothermobacter marburgensis GN=ribL MKRFSDKRTQIKTVMATGTFDIIHPGHGFFLEEAKKLGGENARLVVVLARDSTVRARKRT PIIGEKQRLEVVMMLKPVDEAYLGSETDMFEIVHRLKPDIIAIGPDQKFDIDELRDELRR RGLECEVKRVGKYRRSELDSTCKIIKKIRKMEFDEDALKNC