| UPA00906 | selenocysteinyl-tRNA(Sec) biosynthesis~Biosynthesis of selenocysteinyl-tRNA(Sec). If the pathway for selenocysteine biosynthesis differs in bacteria from that present in eukaryotes and archaea; tRNA(Sec) remains a common factor for selenocysteine formation among the three kingdoms. | None - {{∅}} | True - {{t}} | Unconfirmed presence |  | 
                
                    | UER00896 | selenocysteinyl-tRNA(Sec) from L-seryl-tRNA(Sec) (bacterial route): step 1/1~1 L-seryl-tRNA(Sec) + 1 selenophosphate => 1 phosphate + 1 selenocysteinyl-tRNA(Sec). | None - {{∅}} | True - {{t}} | Unconfirmed presence |  | 
                
                    | UER00895 | L-seryl-tRNA(Sec) from L-serine and tRNA(Sec): step 1/1~1 ATP + 1 L-serine + 1 tRNA(Sec) => 1 AMP + 1 L-seryl-tRNA(Sec) + 1 diphosphate. | None - {{∅}} | True - {{t}} | Unconfirmed presence |  | 
                
                    | ULS00445 | L-seryl-tRNA(Sec) from L-serine and tRNA(Sec) | None - {{∅}} | True - {{t}} | Unconfirmed presence |  | 
                
                    | UER00898 | selenocysteinyl-tRNA(Sec) from L-seryl-tRNA(Sec) (archaeal/eukaryal route): step 2/2~1 H(2)O + 1 O-phosphoseryl-tRNA(Sec) + 1 selenophosphate => 2 phosphate + 1 selenocysteinyl-tRNA(Sec). | None - {{∅}} | None - {{∅}} | Unexplained |  | 
                
                    | VariantPath-1-UPA00906 |  | None - {{∅}} | True - {{t}} | Unconfirmed presence |  | 
                
                    | ULS00447 | selenocysteinyl-tRNA(Sec) from L-seryl-tRNA(Sec) (bacterial route) | None - {{∅}} | True - {{t}} | Unconfirmed presence |  | 
                
                    | VariantPath-2-UPA00906 |  | None - {{∅}} | None - {{∅},{t}} | Unexplained |  | 
                
                    | UER00897 | selenocysteinyl-tRNA(Sec) from L-seryl-tRNA(Sec) (archaeal/eukaryal route): step 1/2~1 ATP + 1 L-seryl-tRNA(Sec) => 1 ADP + 1 O-phosphoseryl-tRNA(Sec). | None - {{∅}} | None - {{∅}} | Unexplained |  | 
                
                    | ULS00446 | selenocysteinyl-tRNA(Sec) from L-seryl-tRNA(Sec) (archaeal/eukaryal route) | None - {{∅}} | None - {{∅}} | Unexplained |  |