Before revision:  For a certain class of IDPs, with N between 24 to 185 , the size grows as R_g \sim N^{0.6}, which agrees with data from Small Angle X-ray Scattering (SAXS) experiments .
After revision:  For a certain class of IDPs, with N between 24 to 441 , the size grows as R_g \sim N^{0.6}, which agrees with data from Small Angle X-ray Scattering (SAXS) experiments .