“…Among these are heparin, heparan sulfate (HS), chondroitin sulfate (CS), dermatan sulfate (DS), and keratan sulfate (KS), which are covalently bound to core proteins, forming proteoglycans (PGs) ( Kjellen and Lindahl, 1991 ; Iozzo, 1998 ; Lindahl et al, 2015 ). Hyaluronan (HA) is a free polysaccharide ( Lindahl and Rodén, 1972 ; Hascall, 2019 ). PGs are distributed in the extracellular matrix and on cell surfaces, and are crucially involved in a wide range of biological processes such as cell adhesion, the regulation of cellular signaling, and assembly of the extracellular matrix ( Esko and Selleck, 2002 ; Häcker et al, 2005 ; Bülow and Hobert, 2006 ; Bishop et al, 2007 ; Sarrazin et al, 2011 ; Thelin et al, 2013 ; Xu and Esko, 2014 ; Mizumoto et al, 2015 ; Neill et al, 2015 ).…”