Queuine Biosynthesis

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7,8-dihydroneopterin 3'-triphosphate biosynthesis
EC 1.7.1.13 preQ1 synthase
EC 1.17.99.6 epoxyqueuosine reductase
EC 2.4.2.29 queuine tRNA-ribosyltransferase
EC 2.4.99.17 S-adenosylmethionine:tRNA ribosyltransferase-isomerase (mechanism)
EC 4.1.2.50 6-carboxytetrahydropterin synthase
EC 4.3.99.3 7-carboxy-7-deazaguanine synthase
EC 6.3.4.20 7-cyano-7-deazaguanine synthase