~16— POSTDOCTORAL FELLOWS Gary Ott, an NIH postdoctoral fellow, is developing experimental techniques for analyzing the heterogeneity of the major classes of plasma lipoproteins and the microheterogeneity of proteins. These techniques, together with other procedures, will be used to analyze variants, Pathological among selected human subjects. Stephen Macevicz, an NIH postdoctoral fellow, either genetic or is developing experimental and mathematical techniques for the flow cytometric study of the effect of cytosine arabinoside (ara-C) on cell cycle traverse. Experimental studies will be carried out in vitro and in vivo on Lewis lung tumor cells. He will adapt an existing model of cell cycle traverse to account for the time dependent cell cycle perturbations produced by a pulse of ara-C. Mason Shen, an NIH postdoctoral fellow, is collaborating on characterization of lipoprotein subfractions that are being used in studies on their modulating effects on immune functions. He is also participating in studies on the effects of diet on lipoprotein properties and function. SUMMER INSTITUTE - A program to bring faculty from minority colleges and universities to the laboratory for eight weeks of training and research. Bessie Foster, (Grambling State University) worked on antinucleoside stains of tumor cells. Jerry L. Johnson, (University of Hawaii, Hilo) worked on environmental impact studies at the geysers. Altaf Rahman, (South Carolina State University) worked on developing new fluorescent tags for cytoenzymological techniques. AFFIRMATIVE ACTION PROGRAMS COOP - is a program sponsored by the Office of Equal Opportunity for college students in science and engineering majors wherein. they work for six months full-time and are in school for six months. Participants in our laboratories include: John Ross OJT - (On-the-Job-Training) is to provide laboratory-relevant work experience to individuals who are economically disadvantaged and have few or no marketable skills for non-professional LLL positions. Participants in our laboratories include: © Debra Caldeira me soci