It absorbs those impact forces and lubricates the joints. And to see exactly what that means, let's take a look at the structure of Agrican. Now the protein component of agriculture basically consists of three globular domains g one, g two and g three. And these are shown on the board. So this is glybular domain g one, glylor domain g two and glybular domain g three. And this entire purple structure is that protein component of the aggregate of the proteoglycan.