“…Resins (methacrylates-acrylates) polymerized at low temperature are superior to the standard epoxy resins in preserving native molecular structure and antigenicity of proteins (Carlemalm et al, 1982;Craig & Goodchild, 1982;Bendayan & Shore, 1982). Colloidal gold is an excellent marker for immunocytochemistry both for the electron microscope (Roth et al, 1978;De Mey et al, 1981 ; for virus antigen, see Garzon et al, 1982; for pea seed storage proteins, see Craig & Millerd, 1981 ;Craig & Goodchild, 1982) and the light microscope (De Mey et al, 1981;Roth, 1982). In this paper we describe immunogold methods that detect RCMV antigen in ultrathin and thick pea leaf sections after low temperature embedding.…”