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ArhGef4 is phosphorylated on Y94 irt Egf
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  *** xArhGef4[tAb]IP phos(Y94)[phosAb] is increased irt Egf (2 min)
    *** cells: A431 in BMLS
    *** inhibited by: PP2 [addition]
    *** unaffected by: STI571 [addition]
    *** source: 18653540-Fig-6a
  *** xArhGef4[tAb]IP phos(Y94)[phosAb] is increased irt Egf (2 min)
    *** cells: A431 in BMLS
    *** inhibited by: xArhGef4(Y94F) [substitution]
    *** inhibited by: xArhGef4(Y94E) [substitution]
    *** source: 18653540-Fig-5f
  *** xArhGef4[tAb]IP phos(Y94)[phosAb] is increased irt Egf (times)
    *** cells: A431 in BMLS
    *** times: 0+ 2+ 5++ 10++ 20++ 30++ min
    *** source: 18653540-Fig-6e
  *** xArhGef4[tAb]IP Yphos[pYAb] is increased irt Egf (2 min)
    *** cells: A431 in BMLS
    *** partially inhibited by: xArhGef4(Y94F) [substitution]
    *** partially inhibited by: xArhGef4(Y94E) [substitution]
    *** source: 18653540-Fig-5f
  *** xArhGef4[tAb]IP Yphos[pYAb] is increased irt Egf (2 min)
    *** cells: A431 in BMLS
    *** source: 18653540-Fig-4
  *** xArhGef4[tAb]IP Yphos[pYAb] is increased irt Egf (2 min)
    *** cells: A431 in BMLS
    *** unaffected by: xArhGef4(Y32E) [substitution]
    *** partially inhibited by: xArhGef4(Y94E) [substitution]
    *** unaffected by: xArhGef4(Y104E) [substitution]
    *** partially inhibited by: xArhGef4(Y94E/Y104E) [substitution]
    *** source: 18653540-Fig-5d

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missing evidence:
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Is ArhGef4 a substrate for EgfR?
Is ArhGef4 a substrate for Src?
relocation to membrane irt Egf
