sentence: Antibodies against the following proteins and tags were purchased : SAP18 ( Santa Cruz #SC -8473 ) ; HA ( Santa Cruz #SC -805 ) ; SIN3A ( Santa Cruz #SC -767 ) ; HDAC1 ( Upstate # 06-720 ) ; HDAC3 ( Upstate # 06890 ) ; FLAG ( Sigma # F3165 ) ; HIV IgG ( AIDS Reagent Program , catalogue # 3957 ) ; hBRM1 ( BD Biosciences cat # 610389 ) ; β - Actin ( Sigma #AC -15 ) .