ChIP-chip ARBSs and p160 coactivator recruitment. Hormone-deprivated LNCaP cells were stimulated with R1881 (10 nM) or vehicle for 24 h. Cross-linked samples were immunoprecipitated with anti-SRC1, anti-GRIP1 or anti-AIB1 antibodies. The precipitated DNA fragments were subjected to qPCR. Identical primer sets were used as described in Figure 2. Data are fold enrichment compared to individual input non-enriched DNA (mean±s.d., n=2).