Figure 4.

ATA targets the extracellular domain of PDGFR, not the transmembrane or cytoplasmic portions of the receptor. (a) Schematic representation of TEL/PDGFRβ, PER, and EKR. RTK, receptor tyrosine kinase; TK, tyrosine kinase. (b) ATA does not target the transmembrane or cytoplasmic portions of PDGFR. Western analysis of total lysates of Ba/F3 cells expressing TEL/PDGFRβ fusion protein. Cells were treated with ATA. pPDGFRβ, PDGFRβ, and tubulin indicate antibodies against phospho-PDGFRβ, total PDGFRβ, and total tubulin, respectively. (c) ATA targets the extracellular domain of PDGFR. Western analysis of total PER-PC12 cell lysates. Cells were serum-starved overnight and treated with ATA and PDGF. pEGFR, EGFR, and tubulin indicate antibodies against phospho-EGFR, total EGFR, and total tubulin, respectively.