Figure 1.

A phage display derived single chain fragment (scFv) was selected that binds Lactobacillus acidophilus (L.a.) specifically. Various bacterial species (see Table 1 for abbreviations) were mixed with the α-La scFv-SV5-GFP-s11 fusion protein and stained with α-SV5-IgG-PE and/or GFP1-10. Binding specificity was confirmed using both standard (A) and imaging (B) flow cytometry (BF = Bright Field, GFP = Green Fluorescent Protein, PE = Phycoerytherin).