Table 1. The number of cytosolic tyrosine residues of each receptor analyzed and the number of residues to which none, one or more than one interacting protein was found
EGFRErbB2ErbB3ErbB4
Total number of cytosolic tyrosines20192327
No interactions8 (40%)11 (57%)14 (60%)16 (59%)
One interaction partner6787
More than one interaction partner6 (30%)1 (5%)1 (4%)4 (14%)
Number of different binding partners9448