Gel of enriched extract of anammox biofilm surface protein dialyzed against double-distilled water (MWCO, 3,500 Da). Results are presented in terms of its rheological behavior described as gel or storage (G′) and viscous or loss (Gʺ) moduli, as well as complex viscosity (η*) (A) and in terms of protein size distribution in an SDS-PAGE gel (lane 1, ladder; lane 2, extract; the red rectangle highlights Brosi_A1236) (B). Bright-field (C), fluorescence (D), and superimposed (E) micrographs stained with thioflavin T (0.5% [wt/vol]) are also shown.