label: 7-cyano-7-deazaguanine tRNA-ribosyltransferase activity
label_lc: 7-cyano-7-deazaguanine trna-ribosyltransferase activity
description: "Catalysis of the reaction: tRNA guanine + 7-cyano-7-deazaguanine = tRNA 7-cyano-7-deazaguanine + guanine."