- Tissue localization of zinc glycinate marker and carcinoembryonic antigen by immunofluorescence. II. Immunofluorescence microscopy. Doos, W.G., Saravis, C.A., Pusztaszeri, G., Burke, B., Oh, S.K., Zamcheck, N., Gottlieb, L.S. J. Natl. Cancer Inst. (1978)