The structure of the coenzyme involved in methanogenesis, which was known previously as ‘Yellow fluorescent compound’ or carboxy-5,6,7,8-tetrahydromethanopterin, has been elucidated by means of nuclear magnetic resonance and UV spectroscopy. The compound is now identified as 5,10-methenyl-5,6,7,8-tetrahydromethanopterin.
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Beelen et al. (1984) studied this question.
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