Originally identified as a homolog of a viral oncogene (v-ets), the ETS family of transcription factors consists of over 25 proteins involved in regulating several biologic processes at the transcriptional level. The ETS DNA binding domain consists of a winged helix conformation and binds the DNA sequences 5′-GGA(A/T)-3′ with varying affinity depending on ETS phosphorylation status, epigenetic modifications, and various protein-protein interactions.