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6 protocols using c7207

1

Quantitative Immunoblotting of β-catenin

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Cells were lysed in a buffer containing 0.5% SDS, 0.1% v/v Triton X-100, 0.25% sodium deoxycholate, 12.5 mM tris, and 96 mM glycine (pH 8.3). Lysate protein concentrations were determined with a Bradford assay, and equal amounts of protein were run on SDS-PAGE gels for immunoblotting on PVDF membranes. Membranes were probed with antibodies specific for β-catenin (C7207, Sigma-Aldrich, St. Louis, MO, USA), histone 3 (H0164, Sigma-Aldrich), and β-actin (A5441, Sigma-Aldrich) before chemiluminescent imaging and quantitation with ImageJ.
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2

Antibody Profiling for Cell Signaling

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The primary antibodies used were rabbit polyclonal anti-phospho-ERK1/2 antibody (1:150; Phospho-p44/42 MAP kinase antibody, 9101S, Cell Signaling Technology, Danvers, MA, USA; [9 (link),10 (link)]), rabbit polyclonal anti-N-cadherin antibody (1/200; ab12221, Abcam, Cambridge, UK; [4 (link)], mouse monoclonal anti-β-catenin antibody (1:1000; C7207, Sigma-Aldrich; Saint Louis, MO, USA, [13 (link)]) and mouse monoclonal anti-RPE65 antibody (1:1000; MAB5428, Millipore; Billerica, MA, USA, [2 (link)]). The secondary antibodies used were biotinylated goat anti-rabbit IgG antibody (1:400; BA-1000, Vector Laboratories, Burlingame, CA, USA), biotinylated goat anti-mouse IgG antibody (1:400; BA-9200, Vector Laboratories, Burlingame, CA, USA), Alexa 488-conjugated goat anti-rabbit IgG antibody (1:500; A-11034, Thermo Fisher Scientific, Waltham, MA, USA) and tetramethylrhodamine-conjugated goat anti-mouse IgG antibody (1:200; T2762, Life Technologies, Rockville, MD, USA).
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3

Comprehensive Immunostaining of Embryonic Tissues

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For immunostaining, embryos were fixed in 4% paraformaldehyde (PFA, in PBS), blocked in 3% goat serum and 0.3% triton in PBS for 2h at room temperature or overnight at 4°C and incubated overnight at 4°C with primary and secondary antibodies. The following primary antibodies were used: anti-Tp63 (rabbit, 1/100, SAB2701838, Sigma), anti-Laminin (rabbit, 1/100, L-9393, Sigma), anti-Collagen IV (rabbit, 1/200, ab6586, Abcam), anti-ZO-1 (mouse IgG1, 1/500, 33-9100, ThermoFisher scientific), anti-GFP (chicken, 1/200, GFP-1020, Aves labs), anti-DsRed (rabbit, 1/300, 632496, Takara), anti phospho-Histone H3 (rabbit, 1/200, 06-570, Millipore), anti activated Caspase 3 (rabbit, 1/200, AF835, R and D systems), anti HuC/D (mouse, 1/200, clone 16A11, A-21271, Thermofischer scientific), anti beta-catenin (mouse, 1/250, C7207, Sigma). For Phalloidin staining, an overnight incubation was performed at 4°C with Phalloidin-Rhodamin (1/200, R415, ThermoFisher scientific) or Phalloidin-Alexa488 (1/200, A12379, ThermoFisher scientific).
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4

SEM Sample Preparation Protocol

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Samples were fixed overnight in 4% PFA, dehydrated in graded ethanols, incubated for20 minutes in 50% HMDS in ethanol followed by three changes of 100% HMDS (Sigma-Aldrich, C7207, Cat#440911), air-dried overnight, mounted on stubs and sputter coated with gold palladium. Specimens were observed and photographed using a Quanta 250 scanning electron microscope (FEI, Hillsboro, OR) at 10 kV accelerating voltage.
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5

Pluripotency Marker Immunostaining Protocol

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Cells were fixed with paraformaldehyde, permeabilized, and stained with primary antibodies against OCT4 (Santa Cruz Biotechnology; sc-8628), NANOG (Abcam; ab808992), UTF1 (Abcam; ab24273), SALL4 (Abcam; ab29112), LIN28 (Abcam; ab46020), and CTNNB1 (Sigma-Aldrich; C7207) followed by staining with appropriate secondary antibodies conjugated to either Alexa Fluor 555 or 647 (Invitrogen). Images were acquired with a Neo 5.5 cSMOS camera (Andor) and processed and analyzed using NIS-Elements and Adobe Photoshop.
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6

Immunohistochemical Analysis of Turtle Gonads

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Gonad-mesonephros complexes from turtle embryos of indicated stages were still immersed in 4% PFA overnight at 4°C, then moved through a MeOH gradient, embedded in paraffin wax and sectioned. Paraffin sections (~5 μm) were first deparaffinized, and antigens were unmasked by microwaving sections in 10 mM/L citrate buffer, pH 6.0 (15 minutes). Sections were covered with primary antibodies and incubated overnight at 4°C or 1 hour at room temperature. The primary antibodies used in this analysis included rabbit anti-Sox9 (AB5535, Chemicon, 1:1000), rabbit anti-Vasa (ab13840, Abcam, 1:200) and mouse anti-β-catenin (C7207, Sigma, 1:250). Secondary antibodies Alexa Fluor 594 donkey anti-rabbit IgG (A21207, Invitrogen) and Alexa Fluor 594 donkey anti-mouse IgG (A21203, Invitrogen), Alexa Fluor 488 donkey anti-rabbit IgG (A21206, Invitrogen), Alexa Fluor 488 donkey anti-mouse IgG (A21202, Invitrogen), which all diluted at 1:250, were used to detect primary antibodies. Nuclei were stained with DAPI. Gonad sections were imaged by confocal microscope (A1 Plus, Nikon).
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