loop_
_pdbx_struct_assembly_auth_evidence.id
_pdbx_struct_assembly_auth_evidence.assembly_id
_pdbx_struct_assembly_auth_evidence.experimental_support
_pdbx_struct_assembly_auth_evidence.details
1 1 'cross-linking' .
2 1 'gel filtration' 'Elutes as a dimer'
3 2 'cross-linking' .