loop_ _ihm_entity_poly_segment.id _ihm_entity_poly_segment.entity_id _ihm_entity_poly_segment.seq_id_begin _ihm_entity_poly_segment.seq_id_end _ihm_entity_poly_segment.comp_id_begin _ihm_entity_poly_segment.comp_id_end 1 1 1 6 MET THR 2 1 7 20 TYR LYS 3 1 21 26 GLU GLN 4 1 27 80 ASN LEU 5 1 81 95 LEU GLU 6 1 96 126 LEU LEU 7 1 127 135 LYS ARG # ... abbreviated ...