Rebekah,
 
Do you have a picture of the artifact?  Could it be formalin pigment in
the bloody areas of the sample?  Do you see it in the negative control?
 
P.S. Lordy I hope this doesn't repeat.
 

Teri Johnson
Managing Director Histology Facility
Stowers Institute for Medical Research
1000 E. 50th St.
Kansas City, Missouri  64110
tjj@stowers-institute.org


 
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