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2 protocols using pfrs2 y196

1

FGF2 and FGFR1 Signaling Pathway Assay

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Recombinant FGF2 was purchased from Gibco (#PHG0024). Heparin sulfate was purchased from StemCell Technologies (#07980). The following antibodies were used (all primary antibodies are rabbit derived unless otherwise noted): anti-FGFR1 (#9740), phospho-FGFR (Y653/654, #3476, mouse derived), phospho-FRS2 (Y436, #3861; Y196, #3864), PLCγ (#5690), phospho-PLCγ (Y783, #2821), ERK (#4695), phospho-ERK (T202/Y204 #4370), Akt (#4691), phospho-Akt (S473 #4060), STAT3 (#4904), phospho-STAT3 (Y705, #9145), E-cadherin (#3195), Vimentin (#5741), ZEB1 (#3396), N-cadherin (#13116), HIF1α (#14179), Bcl-XL (#2764), Hsp90 (#4877), FGF2 (#61977), TGFβ (#3711), Cyclin D1 (#2978), GAPDH (#2118), horseradish peroxidase (HRP)-linked rabbit IgG secondary antibody (#7074) and HRP-linked mouse IgG secondary antibody (#7076), from Cell Signaling Technology. Anti-FRS2 (#10425, mouse derived) was purchased from Abcam. AZD4547 was purchased from Selleck Chemistry. The following CyTOF antibodies were purchased from Fluidigm Inc.: STAT3 (#3173003A), pSTAT3 (#3158005A), Vimentin (#3154014A), TGFβ (#3163010B), SOX2 (#3150019B), and Nanog (#3169014A). Custom antibody-metal conjugations were performed using kits purchased from Fluidigm, Inc. (PRD002) and carrier-free antibodies targeting FGFR1 (#9740), pFGFR1 (#3476), pFRS2 Y196 (#3864), and ZEB1 (#3396) were purchased from Cell Signaling Technology.
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2

Immunoblot-based Characterization of Receptor Signaling

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Immunoblots were probed using antibodies against tEGFR (Cell Signaling), pERK1/2, tERK1/2 (Cell Signaling Technology), pFGFR1, tFGFR1 (Invitrogen), tFGFR2, tFGFR3 () and tFGFR4 (Santa Cruz). pFRS2-Y436 (Abcam), pFRS2-Y196 (Cell Signaling), tFRS2 (Santa Cruz), tIR (Cell Signaling), tPLC γ (Santa Cruz), SH3BP2 (Abcam), pY (Invitrogen), and α-tubulin. Pairwise p- and t- proteins were analyzed on separate gels/immunoblots using the same protein lysate. Immunoblots were quantified using Image J software (NIH). For the co-immunoprecipitation experiments of Fig. 6G, the FGFR1 or SH3BP2 antibody was conjugated to Dynabeads (Invitrogen) overnight, added to NCI-H520 cell extract and incubated at 4°C overnight.
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