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Ubiquitin antibody p4d1

Manufactured by Santa Cruz Biotechnology

The Ubiquitin antibody (P4D1) is a primary antibody that recognizes the ubiquitin protein. Ubiquitin is a small regulatory protein found in all eukaryotic cells and plays a key role in protein degradation and other cellular processes.

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2 protocols using ubiquitin antibody p4d1

1

Immunofluorescence Antibody Validation Protocol

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All antibodies were purchased from Cell Signaling Technology (Danvers, MA) unless otherwise indicated. These include mouse IgG for α-tubulin (DM1A), V5-Tag (E9H8O), GAPDH (6C5) (Santa Cruz Biotechnology, Santa Cruz, CA), PP2A-C subunit (1D6, EMD Millipore, Burlington, MA), PR55α (2G9, EMD Millipore), p53 (DO1, Santa Cruz Biotechnology), FBXL20 (D-4, Santa Cruz Biotechnology), Ubiquitin antibody (P4D1, Santa Cruz Biotechnology), c-Myc (phospho-S62) (33A12E10, Abcam, Cambridge, UK); rabbit IgG for Ki67 (ab16667, Abcam), p53 (FL-393), PP2A-PR55α Subunit [(100C1) and (#4953)], c-Myc (D3N8F), c-Myc (phospho-T58, ab85380), FBXL20 (SCRAPPER) (ProSci, Poway, CA), FBXL16 Antibody (ProSci). Secondary antibodies for immunofluorescence studies included Alexa Fluor 594 Donkey Anti-rabbit IgG and Alexa Fluor 488 Donkey Anti-mouse IgG from Thermo Fisher Scientific. Nuclei were visualized by DAPI (Sigma-Aldrich, St. Louis, MO).
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2

Immunoprecipitation and Ubiquitination Analysis

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293t cells were plated into 10cm dishes. When cells were 50% confluent, cells were transfected with siRNAs listed above (control, Rab40b, Rab40c, or both). After 24 hours, were transfected with FLAG-α-EPLIN using Lipofectamine 2000 (Invitrogen). After 24hrs, cells were treated with 10μM MG132 overnight then lysed in Tris-buffer containing 10mM Iodoacetamide (IAA). Cell lysates were subject to IP with FLAG antibody (M2, Sigma) followed by Western Blot with FLAG or Ubiquitin antibody (P4D1, Santa Cruz).
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