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Menaquinone biosynthesis This family includes two enzymes which are involved in menaquinone biosynthesis. One which catalyzes the conversion of cyclic de-hypoxanthine futalosine to 1,4-dihydroxy-6-naphthoate, and one which may be involved in the conversion of chorismate to futalosine. These enzymes comprise two domains with alpha/beta structures, a large domain and a small domain. A pocket between the two domains may form the active site, a conserved histidine located within this pocket could be the catalytic base.
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