Table 1 The Q646C, H647C, and A648C ErbB4 mutants exhibit increased normalized tyrosine phosphorylation

Cell line ErbB4 tyrosine phosphorylation ErbB4 expression Ratio

Wild-type ErbB4 210000 1800000 0.12
ErbB4 Q646C 1900000 3300000 0.58
ErbB4 H647C 2900000 4700000 0.62
ErbB4 A648C 4000000 4500000 0.89