tokens: Therefore , to understand how ErbB1 / ErbB2 signaling contributes to this process , we used the ErbB kinase inhibitor AG1478in ErbB2 dependent BT-474 and SKBR-3 human breast cancer cells .
folded_tokens: therefore , to understand how erbb1 / erbb2 signaling contribute to this process , we use the erbb kinase inhibitor ag1478in erbb2 dependent bt-474 and skbr-3 human breast cancer cell .