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3 protocols using myogenin m 225

1

Immunofluorescence Imaging of Adherent Cells

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Adherent cell cultures were fixed with 4% PFA, permeabilized with 0.2% Triton-X in PBS, and incubated with primary antibodies: myogenin (M-225) from Santa Cruz (Dallas, TX, USA), α-MyHC (Developmental Studies Hybridoma Bank), and α-Laminin (Sigma). Alexa-488 and Alexa-555 conjugated secondary antibodies that matched the primary antibodies were used at 1:1,000 in PBS (Invitrogen). Nuclei were counterstained with DAPI (Sigma-Aldrich). Images were obtained using an Axioplan2 microscope (Carl Zeiss, Oberkochen, Germany), a ×20 NA 0.75 plan Apochromat (ω/0.17; Carl Zeiss) objective, and a digital Axiocam camera (Carl Zeiss). Digital images were captured using Axiovision (Carl Zeiss) and were processed with Photoshop (Adobe, San Jose, CA, USA).
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2

Immunoblotting of Muscle Proteins

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Immunoblotting was performed as previously described [9 (link)], and the antibodies included MHC (MF20; DSHB; 1:1000), myogenin (M-225; Santa Cruz; #sc-576; 1:1000), phosphorylated Akt (serine473; Cell Signaling; #9271; 1:1000), total Akt (Cell Signaling; #9272; 1:1000), phosphorylated ERK1/2 (Thr202/Tyr204; Cell Signaling; #9101; 1:1000); total ERK1/2 (Cell Signaling; #9102; 1:1000) and β-actin (Sigma Aldrich; #A2228; 1:1000).
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3

Western Blot Analysis of Muscle Proteins

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For the analysis of protein expression, muscle samples were separated on a 15% polyacrylamide gel and the proteins transferred to PVDF (Biorad, Ca, USA). The membrane was probed with primary antibodies diluted in Tris buffered saline (TBS) with 0.1% (v/v) Tween-20 and 0.5% (w/v) milk powder. Membranes were incubated with horseradish peroxidase-conjugated secondary antibodies before detection of antibody binding by chemiluminescence (Amersham). The membranes were reprobed for anti-b-actin to check protein loading. Band intensity was measured using a BioRad imaging densitometer and quantified using Molecular Analyst software.
Antibodies used were as follows; mouse monoclonal antibodies against Pax7 at 1:1000 myogenin F5D at 1:500 (DSHB) and MyoD 5.8A at 1:1000 (BD Biosciences). Rabbit polyclonal antibodies against Myf5 at 1:1000, MyoD M-318 at 1:1000 and myogenin M-225 (Santa Cruz, TX, USA) at 1:500. p38MAPKinase at 1:1000 and phosphorylated p38MAPKinase (Cell Signalling, USA) at 1:1000. Goat polyclonal antibody against Pax3 (Abcam, MA, USA) at 1:2000. Secondary antibodies were either; anti-mouse IgG (Sigma) at 1:2000, anti-rabbit IgG (Sigma) at 1:2000 or anti-goat IgG (Santa Cruz) at 1:2000.
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