negatively regulates negative regulation of glycoprotein biosynthetic process proteoglycan biosynthetic process biological regulation negative regulation of proteoglycan biosynthetic process downregulation of proteoglycan formation down regulation of proteoglycan anabolism downregulation of proteoglycan anabolism down regulation of proteoglycan formation 2014-02-24T16:10:43Z negative regulation of proteoglycan formation negative regulation of proteoglycan synthesis inhibition of proteoglycan synthesis inhibition of proteoglycan biosynthesis down-regulation of proteoglycan formation Any process that stops, prevents or reduces the frequency, rate or extent of the chemical reactions and pathways resulting in the formation of proteoglycans, any glycoprotein in which the carbohydrate units are glycosaminoglycans. downregulation of proteoglycan biosynthetic process inhibition of proteoglycan biosynthetic process down-regulation of proteoglycan anabolism downregulation of proteoglycan biosynthesis downregulation of proteoglycan synthesis down regulation of proteoglycan biosynthesis inhibition of proteoglycan anabolism negative regulation of proteoglycan anabolism GO:1902729 down regulation of proteoglycan synthesis down regulation of proteoglycan biosynthetic process down-regulation of proteoglycan synthesis biological_process mr negative regulation of proteoglycan biosynthesis inhibition of proteoglycan formation down-regulation of proteoglycan biosynthesis down-regulation of proteoglycan biosynthetic process