CAS Number: 960129-66-2 Molecular Weight: 660 Salt Form: TFA Purity: >95% Sequence (3-letter): Asn-Asn-Trp-Asn-Asn-OH Sequence (1-letter): NNWNN-OH Storage: -20 ?C or below Extracellular death factor (EDF) is a linear pentapeptide that activates the cell death pathway in a subset of communicating cells. Programmed cell death in bacteria is dependent on a system of cell-to-cell communication termed quorum sensing. It is sensitive to extreme pH, high temperatures, and other cellular stress. EDF has been shown to trigger cell death at 2.5 ng/ml which significantly reduces population size in some E. coli cultures.