> Does anyone out there know anything about this antibody and where I might
be > able to order it?  I have a pathologist requesting it.  It is also
known as 
> campeth-1.  

It's not CD54 but CD52, CAMPATH-1. See also: 

http://www.histosearch.com/histonet/Oct01/Re.CD52A.html

We couldn't obtain any results on FFPE tissue with clone YTH34.5 from
Serotec. 

Alexander Nader