Upper-left: fraction of binaries with q > 0.5 in the core as a function of the absolute visual magnitude of the host GC. Dashed line is the best fitting straight line whose slope (s) and intercept (i) are quoted in the figure together with the Pearson correlation coefficient (r). PCC clusters are marked with red crosses and are not used to calculate neither the best-fitting line nor r. For completeness in the upper-right panels we show the same plot for the fraction of binaries with q > 0.6, and q > 0.7. Lower panels: fraction of binaries with q > 0.5 in the r_C − HM (left) and r_oHM (right) sample as a function of M_V.