An 8-year-old child is evaluated by the pediatrician, who notes what appear to be 10 small café-au-lait spots on the child’s torso. In addition, on close inspection of the eyes, the presence of Lisch nodules is noted. The patient is diagnosed with von Recklinghausen neurofibromatosis type I. the protein that is mutated in this disorder normally?
A.
activates the GTPase activity of Ras
B.
cleaves cellular proteins during apoptosis
C.
functions as a regulator of the cell cycle.
D.
promotes angiogenesis in the growing tumor mass
E.
promotes the cell to undergo apoptosis