ESR1 and cancer: We found three lincRNAs: GATA3-AS1 (ENSG00000197308), RP11-279F6 (ENSG00000245750) and AC017048 (ENSG00000224577), showed specifically high expression levels in ER-positive (ER+), compared to ER-negative (ER-) cancers and normal breast tissue samples (Fig. 4A).