Correlation between velocity dispersion (σ_tot) and the plane-of-sky projected radius (R) for all 15 protoclusters. Blue, red, and green dots represent the structures for young, intermediate and evolved protoclusters derived using the astrodendro module. The solid orange line represents the fitted line for the correlation and the maroon shaded areas represent the ±3σ regions around the mean fitted value. Black dashed line obtained from the earlier work of Solomon et al. (1987).