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Detection of the osmoregulator betaine in methanogens.
Robertson DE, Noll D, Roberts MF, Menaia JA, Boone DR. Robertson DE, et al. Among authors: menaia ja. Appl Environ Microbiol. 1990 Feb;56(2):563-5. doi: 10.1128/aem.56.2.563-565.1990. Appl Environ Microbiol. 1990. PMID: 2306094 Free PMC article.