Currently, I am trying to stain muscle frozen section with three antibodies CD31, PAX7 and laminin. 

I have tried fixing them using ice-cold 100% methanol and 4% formaldehyde. block for 45 min and incubate for primary and secondary for 1h.

Blocking  buffer: M.O.M kit vector labs

the laminin works greats but for the PAX7 the image has many background staining.

any suggestions will be appreciated.

thanks

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