A. The ectodomain of each calsyntenin was fused to the Fc portion of human IgG and the CstnEC-Fc fusions were used in bead aggregation assays.
B–H. Each of the three Calsyntenin ectodomains, Clstn1EC-Fc (B, C, D), Clstn2EC-Fc (E, F, G) and Clstn3EC-Fc (H, I, J), are able to mediate calcium-dependent bead aggregation (n=3 for each condition). The aggregates formed by Clstn3EC-Fc (F) were smaller than those formed by either Clstn1EC-Fc (B) or Clstn2EC-Fc (D). Each fusion-protein also exhibits some calcium-independent aggregation (C, E, G). In each case, the calcium-dependent increase was statistically significant (p<0.05, Student's T-test). Scale bar = 50 µm.