( ii ) for sphingolipids , we examined the transport of fluorescent analogs of sphingomyelin and glucosylceramide ( glccer ) to the plasma membrane following their de novo synthesis from the fluorescent sphingolipid precursor , n- [ 7- ( 4-nitrobenzo-2-oxa-1,3-diazole ) ] aminocaproyl d-erythro-sphingosine ( lipsky , n. g. , and pagano , r. e. ( 1985a ) j. cell biol . 100 , 27-34 ) .
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plasma
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cell