E74 like factor 1: Lysates

E74-like factor 1 (ELF1) is a member of the ETS (e26 transformation specific sequence) family of proteins, contains an ETS-domain, and shares sequence identity with the Drosophila ecdysone inducible E74 transcription factor. ETS was originally identified in the E26 retroviral isolate that led to the discovery of c-ets-1 (cellular ets-1), a cellular oncogenic transcription factor capable of transforming cells. Like ETS, ELF-1 functions as a transcription factor and has been shown to bind promoter and enhancer elements in a number of immunity responsive genes. ELF-1 is highly expressed in B-cells and appears to play an integral role in B-cell gene expression.