loop_ _ma_template_poly_segment.id _ma_template_poly_segment.template_id _ma_template_poly_segment.residue_number_begin _ma_template_poly_segment.residue_number_end _ma_template_poly_segment.segment_length _ma_template_poly_segment.residue_name_begin _ma_template_poly_segment.residue_name_end 1 1 1 53 53 MET VAL 2 2 1 60 60 ILE ALA # ... abbreviated ...