Database Gene source Insertion 1 TNGTKR Insertion 2 HKNNKS Insertion 3 RSYLTPGDSSSG Insertion 4 QTNSPRRA Whole database CoV 2 (2) 0 3 (3) 2 (2) HIV-1 0 0 0 0 Prokaryotic 27 (27) 3 (3) 74 (0) 66 (1) Eukaryotic 71 (71) 97 (97) 23 (0) 32 (1) Only viral database CoV 3 (3) 3 (3) 5 (3) 3 (2) HIV-1 18 (18) 1 (1) 4 (0)* 6 (0)** Other Eukaryotic viruses 49 (2) 66 (8) 69 (0) 62 (0) Prokaryotic viruses 29 (13) 30 (1) 21 (0) 28 (0) Unclassified virus 1 (1) 0 1 (0) 1 (0)