. "\"Catalysis of the reaction: tRNA guanine + queuine = tRNA queuine + guanine.\" [EC:2.4.2.29]" . . "queuine tRNA-ribosyltransferase activity" . "[tRNA]-guanine:queuine tRNA-D-ribosyltransferase activity" . "guanine, queuine-tRNA transglycosylase activity" . "Q-insertase activity" . "queuine transfer ribonucleate ribosyltransferase activity" . "transfer ribonucleate glycosyltransferase activity" . "tRNA guanine transglycosidase activity" . "tRNA transglycosylase activity" . "tRNA-guanine transglycosylase activity" . "EC:2.4.2.29" . "MetaCyc:QUEUOSINE-TRNA-RIBOSYLTRANSFERASE-RXN" . . "guanine insertion enzyme activity" .