Dear Jamie,

We have tried several different antibodies on cynomolgus monkey. We have
found anti-human CD4 from Novocastra working only on FFPE!!! You just need
to follow recommandations from the supplier and it works. We have not found
anti-CD8 working on paraffin sections.
But now I have a question: how are you able to buy OKT4? Last year we tried
to find this clone and Orthommune answered that does not have any more this
one in offer.

Kind regards,
Grazyna

Grazyna Wieczorek, Dr.med.vet.
Novartis Pharma AG
Basel