has_participant has participant positive regulation of MAP kinase activity GO:0043406 up regulation of MAPK activity upregulation of MAPK activity stimulation of MAPK activity positive regulation of mitogen activated protein kinase activity biological_process Any process that activates or increases the frequency, rate or extent of MAP kinase activity. up-regulation of MAPK activity positive regulation of mitogen-activated protein kinase activity positive regulation of MAPK cascade regulation of protein serine/threonine kinase activity positive regulation of protein serine/threonine kinase activity tumor necrosis factor (human) fibroblast growth factor 2 (human) platelet-derived growth factor receptor beta (human) mast/stem cell growth factor receptor Kit (human) proto-oncogene tyrosine-protein kinase Src (human) 5-hydroxytryptamine receptor 2A (human) receptor-type tyrosine-protein kinase FLT3 (human) tyrosine-protein kinase CSK (human) 5-hydroxytryptamine receptor 2B (human)