2787463 HSPG heparan sulfate proteoglycan 948 1061863 HSP heparan sulfate proteoglycan 11 207274 HS heparan sulfate proteoglycan 5 3927907 HSPGact heparan sulfate proteoglycans 5 3265638 HSPG, perlecan heparan sulfate proteoglycan 3 2096357 HeSPG heparan sulfate proteoglycan 2 2780418 HPSG heparan sulfate proteoglycan 1 3635735 HS-proteoglycan heparan sulfate proteoglycan 1