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methanobactin biosynthesis cassette protein MbnB The first characterized methanobactin is made from a ribosomal precursor in Methylosinus trichosporium OB3b. Two additional species with homologous precursor peptides (family TIGR04071) are Azospirillum sp. B510 and Gluconacetobacter sp. SXCC-1. This model describes a clique of related sequences, domain or full-length, that occurs always and only next to a methanobactin precursor. The model excludes some close homologs from species where no similar precursor can be found.
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