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| Content Provider | World Health Organization (WHO)-Global Index Medicus |
|---|---|
| Author | Gruenberg, J. Sherman, I. W. |
| Abstract | Human erythrocytes infected with the malarial parasite Plasmodium falciparum were labeled metabolically with a mixture of 15 radioactive amino acids. When synchronously growing parasites were at the schizont stage of development infected cells were concentrated and purified by using a Percoll-Hypaque gradient. The plasma membrane of the infected erythrocyte, isolated by binding cells to a solid support (Affi-Gel 731, Bio-Rad), was less than 1% contaminated with parasite membranes. Erythrocyte membrane proteins were analyzed by polyacrylamide gel electrophoresis and autoradiography. Despite the high sensitivity of the procedure, there was no evidence for the insertion of parasite proteins into the infected host cell membrane. One possible exception is a Mr 230,000 parasite protein present maximally as 9,000 copies per infected erythrocyte membrane. Moreover, no differences in the membrane proteins were observed between a highly knobby clone and a knobless clone of the same strain of P. falciparum. These findings appear to rule out the presence of parasite protein(s) playing a structural role in the formation of knobs on the erythrocyte surface and question whether the antigenic determinants on the P. falciparum-infected erythrocyte are of parasite origin or whether such antigens represent newly exposed or chemically modified erythrocyte determinants. |
| ISSN | 00278424 |
| e-ISSN | 10916490 |
| Journal | Proceedings of the National Academy of Sciences of the United States of America |
| Issue Number | 4 |
| Volume Number | 80 |
| Language | English |
| Publisher | National Academy of Sciences |
| Publisher Date | 1983-06-01 |
| Publisher Place | United States |
| Access Restriction | Open |
| Subject Keyword | Erythrocyte Membrane Erythrocytes Parasitology Malaria Blood Membrane Proteins Molecular Weight Plasmodium Falciparum Research Support, Non-U.S. Gov't Multidisciplinary |
| Content Type | Text |
| Resource Type | Article |
| Subject | Multidisciplinary |
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