loop_
_pdbx_nonpoly_feature.ordinal
_pdbx_nonpoly_feature.comp_id
_pdbx_nonpoly_feature.label_asym_id
_pdbx_nonpoly_feature.type
_pdbx_nonpoly_feature.value
_pdbx_nonpoly_feature.provenance
1 SF4 B 'Group charge' 2 Author