Found in functional membrane microdomains (FMM) that may be equivalent to eukaryotic membrane rafts. FMMs are highly dynamic and increase in number as cells age. Flotillins are thought to be important factors in membrane fluidity. Homooligomerizes. Present in detergent-resistant membrane (DRM) fractions that may be equivalent to eukaryotic membrane rafts, with 1 focus per cell; lost when cells are treated with squalene synthase inhibitor zaragozic acid. These rafts include proteins involved in signaling, molecule trafficking and protein secretion. Belongs to the flotillin-like FloA family.