matrix_attachment_site http://en.wikipedia.org/wiki/Matrix_attachment_site S/MAR scaffold matrix attachment region INSDC_feature:regulatory INSDC_qualifier:matrix_attachment_region S/MAR element SMAR sequence matrix attachment site SO:0000036 MAR matrix association region matrix attachment region nuclear matrix attachment site scaffold attachment site nuclear matrix association region A DNA region that is required for the binding of chromatin to the nuclear matrix. chromosomal_regulatory_element