Fractions of SFGs with respect to (left) M_⋆ and (right) Σ₅. Bins are indicated by the vertical dashed lines and show the separation in low, intermediate, and high mass or density subsamples. We show fractions from structure A with red circles, from structure B with blue squares and from the full cluster sample (sum of structures A and B) with purple triangles; the fractions from the VVDS field sample are depicted by the green inverted triangles. For M_⋆, a total of 359 sources were employed, while for Σ₅ a total of 361 sources were employed. Error bars represent the Poisson statistics errors associated with the fractions in their specific bin.