Direct histochemical staining for transthyretin (prealbumin)?
 

Kindly, is anyone aware of any histochemical stain for transthyretin, ideally, which can differ-diagnose from other types of amyloid depositions (AA, AL, κ-, λ- chains)?

The best thing I have come up with is an "autoclave" and "guanidine/HCl" technique - no actual stain that is...

Any help is highly appreciated fellas!

Thank u 4 the time u took reading this.