Fig. 5: Lectin staining reveals a glycan-rich matrix associated with the foregut niche.

A Table of lectins that stained the proventriculus. Lectin staining of proventriculus transverse sections for B WGA in a colonized fly, C sWGA in a colonized fly, D WGA in a germ-free fly, and E WGA in a newly eclosed germ-free fly before first food ingestion. Scale bars: 20 µm. Arrowheads indicate lectin staining in the interior proventriculus lumen. n ≥ 3 biological replicates per treatment. CF: calcofluor.