part_of RNApol_III_promoter_type_1 A_box A_box_type_1 2010-10-06T05:43:43Z kareneilbeck sequence SO:0001675 The A box can be found in the promoters of type 1 and type 2 (pol III) so sub-typing here allows the part of relationship of the subtypes to remain true. An A box within an RNA polymerase III type 1 promoter. A box type 1