[Histonet] Positive Control for IF?

[Paula Sicurello]

Good Afternoon Netters,

Since we went down the path of hot dogs and Slim Jim's as positive controls
for FFPE stains, I was wondering.....

Is there a source, like a hot dog or piece of steak, that could be a
positive control for immunofluorescence C4d?

What I'd really like to find is some food or food product (our positive
patient biopsies for the frozen IF are teeny-tiny) that is positive for the
whole host of IF stains:  IgG, IgA, IgM, Kappa, Lambda, you get the picture.

Please send your suggestions my way.

Thanks in advance,

Paula  :-)