Products of proto-oncogenes. Normally they do not have oncogenic or transforming properties, but are involved in the regulation or differentiation of cell growth. They often have protein kinase activity.

Synonyms: Proto-Oncogene Proteins, Cellular, 0, Proto Oncogene Proteins, Proto Oncogene Products, Cellular, Cellular Proto Oncogene Proteins, Proto-Oncogene Products, Cellular, Proto-Oncogene Proteins, Cellular Proto-Oncogene Proteins, c-onc Proteins, Cellular Proto-Oncogene Products, Proto Oncogene Proteins, Cellular, c onc Proteins