Differential interaction of EBP with EEN family members. (A) Quantitative liquid culture assay. Lysates of cotransformants were quantified with ONPG substrate. Each data point represents the average ± SD of 3 independent experiments. (B) Amino acid alignment of the SH3 domains of EEN family members. Identical residues are indicated by dashes, and consensus residues among family are marked by asterisks.