DiOC16(3) is a lipophilic cyanine dye with two C16 hydrocarbon chains. It can be optimally excited by the 488 nm argon laser line with green fluorescence emission (λEx/λEm = 484/501 nm). The dye can be used to stain cytoplasmic membranes. Recently, DiOC16 has been combined with DPA (cat # 60037) to detect cell membrane potential change with high sensitivity. Please also see our DiO/DPA membrane potential detection kit (cat# 30037).