In its coil state, the radius of gyration of the macromolecule scales as its chain length to the three-fifths power.  As it passes through the coil–globule transition, it shifts to scaling as chain length to the half power (at the transition) and finally to the one third power in the collapsed state.  The direction of the transition is often specified by the constructions coil-to-globule or globule-to-coil transition.