PMID-sentid Pub_year Sent_text comp_official_name comp_offsetprotein_name organism prot_offset 2398084-6 1990 Growth-factor activity was determined by assessing the effect of serum on the incorporation of [3H]thymidine and on cell counts in primary cultures of osteoblastic cells from the calvaria of fetal rats. 3h]thymidine 96-108 myotrophin Rattus norvegicus 0-13