Sequence-specific transcriptional activator (PubMed:24100448, PubMed:26316623, PubMed:28255014). Recognizes the DNA sequence 5'- C[CA]GGAAGT-3'. {ECO:0000269|PubMed:24100448, ECO:0000269|PubMed:26316623, ECO:0000269|PubMed:28255014}. This is the function of Ensembl gene identifier ENSG00000151702 (FLI1, Fli-1 proto-oncogene, ETS transcription factor).