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2 protocols using anti ha high affinity 3f10

1

Immunoblot Analysis of Cell Signaling

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Preparation of lysates and immunoblot analyses were performed as described previously45 (link) using Tris lysis buffer (50 mM Tris–HCl pH 7.8, 150 mM NaCl, 1% IGEPAL CA-630) containing 100 mM NaF, 100 mM β-glycerophosphate, 20 μg/ml RNase A, 20 μg/ml DNase and 1/300 protease inhibitor cocktail (P8340, Sigma–Aldrich) and 1/100 phosphatase inhibitor cocktail #2 (P5726, Sigma–Aldrich). Antibodies used in this study were purchased from the following sources: rabbit anti-Cdk2 (M2 SC-163, Santa Cruz Biotechnology), mouse anti-tubulin (Developmental Studies Hybridoma Bank, University of Iowa), mouse anti-Cyclin A (SC-751, Santa Cruz Biotechnology), mouse anti-cyclin E (SC-198, Santa Cruz Biotechnology), rabbit anti-CDK4 (sc-260, Santa Cruz Biotechnology), mouse anti-Rb (G3-245, BD Pharmingen), rabbit anti-p27 (sc-528, Santa Cruz Biotechnology) and anti-HA High affinity (3F10, 11867423001, Sigma-Aldrich). Secondary antibodies used for western blot analysis were goat anti-mouse (31430, Thermo Scientific) and, goat anti-rabbit (31460, Thermo Scientific). mouse anti-tubulin hybridoma cell line (clone #12G10) was developed by J. Frankel and E.M. Nelson under the auspices of the NICHD and maintained by the Developmental Studies Hybridoma Bank.
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2

Immunostaining of Drosophila Gut

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Guts were dissected in PBS and transferred into 4% PFA immediately after dissection and staining was performed on an orbital shaker. After 45 min of fixation guts were washed once with PBS for 10 min. Antibodies were diluted in 0.5% PBT + 5% normal goat serum. The incubation with primary antibodies (1:250 anti-Dlg-1 [mouse; Developmental studies Hybridoma Bank (DSHB)]; 1:50 anti-Pros [mouse; DSHB]; 1:2000 anti-pH3 [rabbit; Merck Millipore, 06–570]; 1:50 anti-EcR common Ag10.2 [mouse; DSHB]; 1:500 anti-HA High Affinity 3F10 [rat; Merck, Sigma-Aldrich]; 1:1500 anti-ß-Galactosidase preabsorbed [rabbit; Cappel Research Products]) was performed at 4°C over night. After washing with PBS guts were incubated with secondary antibodies (1:500 Goat anti-MouseAlexa647 [Invitrogen]; 1:500 Goat anti-RatAlexa647 [Invitrogen]; 1:500 Goat anti-RabbitAlexa647 [Invitrogen]) and DAPI (1:1000; 100 µg/ml stock solution in 0.18 M Tris pH 7.4; DAPI No. 18860, Serva, Heidelberg) for at least 3 hr at RT. Guts were washed a last time with PBS prior to mounting in Fluoromount-G Mounting Medium (Electron Microscopy Sciences).
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