GCA_000015705.1 P9303_04701 definition 7-cyano-7-deazaguanine reductase GCA_000015705.1 P9303_08591 definition possible EF-1 guanine nucleotide exchange domain-containing protein GCA_000015705.1 P9303_24391 definition tRNA (guanine-N(7))-methyltransferase GCA_000015705.1 P9303_24901 definition tRNA-guanine transglycosylase