Katz E P, Wachtel E J, Maroudas A
Biochim Biophys Acta. 1986 Jun 3;882(1):136-9. doi: 10.1016/0304-4165(86)90065-6.
The molecular packing density of collagen and hence the intrafibrillar water content appears to be regulated in cartilage by the osmotic pressure gradient existing between the extrafibrillar and the intrafibrillar compartments.