TY - RPRT TI - Lefty proteins exhibit unique processing and activate the MAPK pathway. AU - L Ulloa AU - J W Creemers AU - S Roy AU - S Liu AU - J Mason AU - S Tabibzadeh PY - 2001 DO - 10.1074/jbc.m006933200 UR - https://pubmed.ncbi.nlm.nih.gov/11278322/ ID - 11278322 ER -