Association of Ku heterodimer with viral DNA ends
type: GO_0003674
BFO_0000050: 2-LTR circle formation
directly activates: Association of XRCC4:DNA ligase IV complex with viral DNA ends

Association of XRCC4:DNA ligase IV complex with viral DNA ends
type: GO_0003674
BFO_0000050: 2-LTR circle formation
directly activates: 2-LTR formation due to circularization of viral DNA
directly activates: Catalysis1136

2-LTR formation due to circularization of viral DNA
type: Restriction
  on property: BFO_0000066
  some values from: GO_0005654
type: GO_0003909
BFO_0000050: 2-LTR circle formation

2-LTR circle formation
type: GO_0008150