The Jmol image is based on pdb file 5p21

Spacefilled image of RAS protein in cpk colors Spacefilled image of RAS protein in dark gray

Spacefilled image of GNP (in CpK colors) in RAS spacefilled image of GNP (red) in RAS

Magnesium ion(orange) Effector region... residues 32-40 (cyan)

Guanine base bonded by interactions with the residues 116-119 and 145-147 (yellow)

Highly conserved region in all RAS 21 proteins (slate blue)

Phosphate binding loop (purple)

Important branching side chains (lys16, asp30, phe30) (green)