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4 protocols using sab2500450

1

Immunofluorescence Protein Detection

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The primary protein antibodies to GAPDH (goat pAb; SAB2500450, Sigma), β-tubulin (rabbit pAb; ab6046, Abcam), α-Actinin (rabbit mAb, 6487S, Cell Signaling Technology), ER-α (rabbit mAb; RM9101S, Thermo Fisher Scientific), and mTOR (rabbit,2983S, Cell Signaling Technologies) were used. Secondary antibodies to goat IgG prelabelled with Alexa Fluor 647 (A21447), rabbit IgG pre-labelled with Alexa Fluor 555 or 647 (A31572 and A31573) were purchased from Invitrogen. All primary antibodies were used at a 1:10 dilution in 2% TBST/BSA from stock concentrations and incubated for 2 hours at room temperature, except for anti-GAPDH and anti-ER-α, which were incubated for 3 hours at room temperature. Secondary antibodies were diluted to a 1:20 working concentration in 2% TBST/BSA from stock and incubated for 1 hour at room temperature, protected from light.
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2

Comprehensive Cell Surface Characterization

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The primary antibodies in the surface staining characterization experiments include EpCAM-FITC (mouse, mAb, SAB4700424, Sigma), IgG-FITC (mouse, mAB, SA1–12320, Pierce), EpCAM-AlexaFluor 488 (mouse, mAb, 53–8326-42, Ebioscience), primary protein antibodies to GAPDH (goat pAb; SAB2500450, Sigma), β-Tubulin (rabbit pAb; ab6046, Abcam). Secondary antibodies to goat IgG prelabeled with Alexa Fluor 488 and 555 (A11055 and A21432) were purchased from Invitrogen.
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3

Multicolor Immunofluorescence Staining Panel

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The primary antibodies include GAPDH (goat pAb; SAB2500450, Sigma), βTub (rabbit pAb; ab6046, Abcam), α-actinin (rabbit mAb; 6487, Cell Signaling), HER2-3B5 (mouse mAb; ab16901, Abcam), HER2-2G11 (mouse mAb; AHO0918, Thermofisher Scientific), ERK1/2 (rabbit mAb; 4695, Cell Signaling), phospho-ERK1/2 (Thr202/Tyr204) (rabbit mAb; 4370, Cell Signaling), mTOR (rabbit mAb; 2983, Cell Signaling), panCK (rabbit pAb; Z0622, Dako), S6-ribosomal protein (mouse mAb; 2317, Cell Signaling), phospho-S6-ribosomal protein (Ser240/244) (rabbit mAb; 5364, Cell Signaling). The secondary antibodies include donkey anti-mouse IgG (H + L) (Alexa Fluor 488 conjugate, A21202, Thermofisher Scientific), donkey anti-goat IgG (H + L) (Alexa Fluor 555 conjugate, A21432, Thermofisher Scientific), and donkey anti-rabbit IgG (H + L) (Alexa Fluor 647 conjugate, A31573, Thermofisher Scientific).
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4

Immunohistochemical profiling of breast cancer

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Primary antibodies and fold dilutions against GAPDH (1:20, goat polyclonal antibody (pAb); SAB2500450, Sigma), β-tubulin (1:10, rabbit pAb; ab6046, Abcam), EpCAM (1:10, rabbit pAb; 3599, Cell Signaling), EGFR (1:10, mouse monoclonal antibody; 2322, Cell Signaling), ER (1:10, rabbit monoclonal antibody; RM-9101-S0, ThermoScientific), HER2 (1:10, mouse monoclonal antibody; MA513105, Pierce), ERK1/2 (1:10, rabbit monoclonal antibody; 4695, Cell Signaling), eIF4E (1:10, rabbit monoclonal antibody; 2067, Cell Signaling), mTOR (1:10, rabbit monoclonal antibody; 2983, Cell Signaling), panCK (1:10, rabbit pAb; Z0622, Dako) and CK8 (1:10, mouse monoclonal antibody; C5301, Sigma) were the immunoprobes in both breast cancer cell lines (BT-20, MCF7 and SK-BR-3) and patient-derived CTCs. For analysis of the MCF7-GFP cell line, an anti-GFP antibody (ab6673, Abcam) followed by anti-goat AlexaFluor 555-conjugated secondary antibody (A21432, Invitrogen) were used. Secondary antibodies to goat IgG pre-labelled with AlexaFluor 488 and 555 (A11055 and A21432), mouse IgG pre-labelled with AlexaFluor 488, 555 and 647 (A21202, A31570 and A31571), and rabbit IgG pre-labelled with AlexaFluor 488, 555 and 647 (A21206, A31572 and A31573) were used as prepared by the vendor (Invitrogen). All secondary antibodies were applied as a 1:20 dilution.
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