By Robert E. Harmon

ISBN-10: 0123261503

ISBN-13: 9780123261502

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7. Some of our findings are summarized in Tables VI and VII. 52 g Triton X-lOO/g complex 46f500 g protein/mole (Fig. 7 and Table VI) the first step in sulfatide formation, is membrane bound in kidney but does not appear to be localized in any single cell organelle. This is in sharp contrast to the sulfotransferase enzyme (2) which is localized in Golgi apparatus in kidney (Table III) . Enzyme (4), which converts glucosylceramide to lactosyl ceramide, a precursor of gangliosides, appears to be a Golgi enzyme in kidney.

In order to accomplish this, we were obliged to develop methods for the isolation of Golgi apparatus from liver since methods for the isolation of the other organelles were already well developed. We then applied these techniques to isolated Golgi apparatus and other purified cell organelles from kidney, which we believed was a better source for study of the biosynthesis of glycolipids. The Golgi apparatus consists of a series of flattened, smooth membrane-bound cisternae surrounded by what appear in sections to be small vesicles and often by large secretory vesicles (Fig.

Kathryn Dewey is also gratefully acknowledged. This study was aided by NIH Grants AM14632 and AM17223. REFERENCES 1. Waechter, C. , and Lennarz, W. , Ann. Rev. Biochem. (1976) 45, 95. 2. , Chem. Phys. Lipids (1970) 5, 270. 3. Spiro, R. , Spiro, M. , and Adamany, A. , Biochem. Soc. Symp. (1974) 40, 37. 4. Redman, C. , J. Biol. Chem. (1969) 244, 4308. 5. , and Sabatini, D. D,, J. Cell Biol. (1970) 45, 130. 6. LeBlond, C. , in "The Cell Surface in Development" (1974), Moscona, A. , Wiley, New York, pp.

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