Fibroblasts were collected for immunoprecipitation. In order to map the DNMT3A-lncRNA interactome, the biotinylated lncRNA-cDNA/Dnmt3a complex was immunoprecipitated with anti-DNMT3A antibodies (ab88470; Abcam). The biotinylated lncRNA–cDNAs were further purified from genomic DNAs using M-280 streptavidin beads (Invitrogen; Zhang et al., 2014b). After purification, the DNMT3A-interacting lncRNA–cDNAs were quantitated by PCR using target gene primers.
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