Trace Methane in Some Proteolytic Nonglucidolytic Clostridia: The Role of Some S-Methyl and N-Methyl Compounds

Clostridia form a very heterogeneous bacterial group involved in the various aspects of the decomposition of organic matter1–3. The reduction into methane of various substrates 4–8 formed in the prior steps by members of microbial communities, e.g., Clostridia1,2,9 is carried out by methanogens.