Comparative β-Gal liquid assays were performed to determine the relative binding strength of the identified interaction partners (n = 6). A representative member of each clone group was re-transformed in yeast cells (AH109) together with TK3-SH3 (light grey) or TK3-US-SH3 (dark grey). The tested clones were (from left to right): diaphanous (SmDia), the eukaryotic translation initiation factor (eIF4γ2b), the BAF60 subunit of the SWI/SNF complex (SWI/SNF-BAF60), the YME1-like metalloprotease (YME1-homologue), the mRNA (guanine-7) methyl transferase (RNA methyl TF), the quinolinate phosphoribosyl-transferase (phosphoribosyl TF), the SH3 binding protein (SH3 domain BP), the Smad protein (Smad2/3), and pericentrin B. As negative control, yeast cells were transformed with TK3-US-SH3 only (bait only).