The sarkosyl-treated OM fraction was compared with the intracellular fraction derived from the same A. muciniphila cells (Figures 1A,B) for the activity of four relevant mucin-degrading enzymes (sialidase, fucosidase, N-acetyl-β-glucosaminidase, GlcNAc-sulfatase) (Figure 2). Here, MUC5AC is linked to ocular melanoma.