7-carboxy-7-deazaguanine + NH4(+) + ATP = 7-cyano-7-deazaguanine + ADP + phosphate + H2O + H(+)
7-carboxy-7-deazaguanine + nh4(+) + atp = 7-cyano-7-deazaguanine + adp + phosphate + h2o + h(+)
"preQ0 synthase"
"preq0 synthase"