GTP:GTP guanylyltransferase activity

uniprot-protein:Q9A5I5, uniprot-protein:P0AAP1, uniprot-protein:P0AA89, uniprot-protein:B8GZM2, uniprot-protein:P64825, uniprot-protein:P75908, uniprot-protein:P77302, uniprot-protein:P0AA90, uniprot-protein:Q320T0, uniprot-protein:Q0T466, uniprot-protein:Q83KV7, uniprot-protein:Q3Z1N3, uniprot-protein:P31129, uniprot-protein:P76237, uniprot-protein:P76245, uniprot-protein:P76330, uniprot-protein:P38097, uniprot-protein:P46139, uniprot-protein:Q54R09, uniprot-protein:G0EUS9, uniprot-protein:G0EXE9, uniprot-protein:G0F196, uniprot-protein:G0ET32, uniprot-protein:F8GNJ3, uniprot-protein:F8GT13, uniprot-protein:E3Y2S2, uniprot-protein:D8N349, uniprot-protein:D8NI63, uniprot-protein:D8NVV7, uniprot-protein:D8NSR7, uniprot-protein:D8PAA9, uniprot-protein:D8PCM5, uniprot-protein:B6JHB4, uniprot-protein:B6JFU3, uniprot-protein:E3HJ50, uniprot-protein:F8JCL9, uniprot-protein:F8JB08, uniprot-protein:F8JBV2, uniprot-protein:E4NZH9, uniprot-protein:E4P0Y0, uniprot-protein:Q18BU3, uniprot-protein:Q18C34, uniprot-protein:Q189V1, uniprot-protein:Q18BU0, uniprot-protein:Q183X4, uniprot-protein:Q183J0, uniprot-protein:Q18BU4, uniprot-protein:F0VVM8, uniprot-protein:D2TII3, uniprot-protein:D2Q8C7, uniprot-protein:G4SZ12, uniprot-protein:G4SU30, uniprot-protein:G4T1T3, uniprot-protein:G4SVS2, uniprot-protein:G4SXH6, uniprot-protein:G4T2F6, uniprot-protein:G4SXU1, uniprot-protein:G4SY12, uniprot-protein:G4SX83, uniprot-protein:G4T3N0, uniprot-protein:F5RV88, uniprot-protein:D5MN70, uniprot-protein:D8NAZ6, uniprot-protein:D6CKR2, uniprot-protein:D8G7E7, uniprot-protein:D8G4Q3, uniprot-protein:D8G512, uniprot-protein:D8FTY7, uniprot-protein:D8G6R5, uniprot-protein:D8G2H0, uniprot-protein:D8G6R0, uniprot-protein:D8G0K4, uniprot-protein:D8FX82, uniprot-protein:D8G4D8, uniprot-protein:D8FVN0, uniprot-protein:D8G7D0, uniprot-protein:D8G221, uniprot-protein:D8G759, uniprot-protein:D8FTC9, uniprot-protein:D6CLU5, uniprot-protein:D6CQ99, uniprot-protein:D6CRP9, uniprot-protein:D6CSJ0, uniprot-protein:D6CQ96, uniprot-protein:B6BKL4, uniprot-protein:C4YV54, uniprot-protein:D0D8N0, uniprot-protein:G2ZW36, uniprot-protein:G2ZX68, uniprot-protein:F5SI45, uniprot-protein:F9DTZ3, uniprot-protein:D5MK70, uniprot-protein:D5RQA8, uniprot-protein:F7TX70, uniprot-protein:C6EEM8, uniprot-protein:F8BH97, uniprot-protein:E4RAA6, uniprot-protein:E4RFY1, uniprot-protein:E7HAZ1