>6SK4_1|Chains A, B, C, D|Methylcorrinoid:tetrahydrofolate methyltransferase|Desulfitobacterium hafniense Y51 (138119) GSFKFTAQQHVYDINGVKVGGQPGEYPTVLIGSIFYRGHKIVSDGQKGIFDKDAAKALLDQEAELSAETGNPFIIDVLGESVEALTKYVEFILENTTAPFLLDSISPDVRVGALKNLGKDPEIQKRLIYNSIEEHYTEEELAAIKEAGLKTAVILAFSKKALKPNARIDLLQGKDDKEGLIAAAKRAGIEQFLVDPGVLDVASNSWTTEAINVVKEQFGYPGGCAPSNAVYLWKKMRSKGTPFFEVAGAAVFTYPITQGADFILYGPMMNAPWVYRAIATTDAMIAYNNKLTGVKMGTTEHPLLKIF