_pdbx_struct_chem_comp_feature.ordinal 1
_pdbx_struct_chem_comp_feature.auth_comp_id Q20
_pdbx_struct_chem_comp_feature.auth_seq_id 10
_pdbx_struct_chem_comp_feature.seq_num .
_pdbx_struct_chem_comp_feature.pdb_strand_id Q
_pdbx_struct_chem_comp_feature.asym_id Q
_pdbx_struct_chem_comp_feature.type 'SECONDARY STRUCTURE'
_pdbx_struct_chem_comp_feature.details 'Helix of length 4 beginning at atom position C2A.'