You can find it in Sigma catalogue. It is lyophilized powder. I had ever tried it before and it works well for hemagglutination assay. Shih-Lien Wang wrote in message <369BFF8E.5A4F at acs.bu.edu>... >Hi, > > Does anyone happen to know where I can buy the sheep RBC for immunogen >in U.S.A? Thank in advance? > >Lien