x1 = sumrc1
x2 = r
x3 = c1
x4 = c2
x5 = ePI3K
x6 = m3PI
x7 = eGEF
x8 = mRas
x9 = x1
x10 = x2
x11 = y
x12 = yp
x13 = ypp
x14 = z
x15 = zp
x16 = zpp
x17 = fGEF
x18 = w
x19 = eph