PMID-sentid Pub_year Sent_text comp_official_name comp_offsetprotein_name organism prot_offset 16254036-5 2006 To determine the key RAF isoform mediating RET/PTC-induced ERK phosphorylation, we stably transfected doxycycline-inducible RET/PTC3-expressing thyroid PCCL3 cells with small interfering RNA vectors to induce selective knockdown of BRAF or CRAF. Doxycycline 102-113 ret proto-oncogene Homo sapiens 47-50