PMID-sentid Pub_year Sent_text comp_official_name comp_offsetprotein_name organism prot_offset 28558026-4 2017 Using this system, we demonstrate that heparin, an analog of heparan sulfate, induced the dimerization of RPTPsigma, whereas chondroitin sulfate increased RPTPsigma activity by inhibiting RPTPsigma dimerization. Heparin 39-46 protein tyrosine phosphatase receptor type S Homo sapiens 106-115