In molecular biology,<unk> is the name of a protein, the gene that encodes it, and the family and superfamily (see<unk> superfamily) of proteins to which it belongs. The<unk> oncogene is a signal transduction protein, which means that it communicates signals to other cells. Sometimes a DNA mutation turns the signal permanently on, which leads to unlimited cell growth and cancer. The<unk> superfamily of small GTPases includes the<unk>  Rho, Arf, Rab, and<unk> families.
Ras 
Src 
APC 
BRAF
AKT
PCNA
ErbB
CREB