has subject area Biochemical Phenomena - MAP Kinase Signaling System Carrier Proteins - ras Proteins Cell Physiological Phenomena - Cell Proliferation Cell Physiological Phenomena - MAP Kinase Signaling System Epidermal Cells GTP Phosphohydrolases - ras Proteins Growth - Cell Proliferation Homeostasis Humans Metabolic Networks and Pathways - MAP Kinase Signaling System Neoplasms Peptides - Extracellular Signal-Regulated MAP Kinases Peptides - ras Proteins Protein-Serine-Threonine Kinases - Extracellular Signal-Regulated MAP Kinases Proteins - Extracellular Signal-Regulated MAP Kinases Proteins - ras Proteins