Folate binding protein

Does anyone have any experience  staining for folate binding protein.  I
have cyto-spins of human tumor cells grown from culture that I have tried
staining with  two different clones without much success.  The clones are
from ATCC designation FBP 1-279-866 and FBP 1-641-101.  Any advice would be
appreciated, thanks in advance.
Gilead Sciences
Boulder, CO

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