preferred_name: heparan sulfate proteoglycan biosynthetic process, chain elongation
preferred_name_lc: heparan sulfate proteoglycan biosynthetic process, chain elongation
label: heparin proteoglycan biosynthetic process, polysaccharide chain biosynthetic process
label_lc: heparin proteoglycan biosynthetic process, polysaccharide chain biosynthetic process