Barb,

CD17 is lactosylceramide, a marker for granulocytes, monocytes and
platelets.  I think that what you require is CD117( c-Kit ), which
stains GIST, as well as some other cell types. This was a presentation
at the last local immunohistochemistry user group meeting. 
Antibodies against CD117 are available from a variety of sources. We use
a polyclonal from either Santa Cruz or Dako. Contact me offline or at
(905)521-2100 ext 3158 for more info.

Regards

Bryan

>----------
>From: 	Terrett, Barb[SMTP:Barb_Terrett@pmh.toronto.on.ca]
>Sent: 	June 21, 1999 10:33 AM
>To: 	'histonet@pathology.swmed.edu'
>Subject: 	CD17
>
>Helloooo Histonet,
>A request has been made to me for info on CD17, a GI stromal tumour marker.
>Is anyone familiar with this Ab ? So far I have had no luck locating it.
>
>Also, I wanted to say how happy I am to have the answer to a question I had
>not asked yet! I was going to ask for the protocol for elmer's glue slides,
>and lo and behold there it is! The histonet is amazing!!
>
>ttfn b
>
>